제가 보기에는 다 제대로 되어 있어 보이더라구요... 그런데도 안되니 답답하네요...
프로그램을 아는것도 아니고, 그냥 주먹구구식으로 모양편집 정도 하는 정도라서요..
아래는 소스내용이구요.. 휴대폰전화 부분이 앞자리번호가 뒷자리에 그대로 나옵니다.

<?
if (!defined("_GNUBOARD_")) exit; // 개별 페이지 접근 불가

//주민등록번호1
$ex1_filed = explode("-",$write[wr_1]);
$ext1_00  = $ex1_filed[0];
$ext1_01  = $ex1_filed[1];

//연락가능한 전화번호1
$ex2_filed = explode("-",$write[wr_2]);
$ext2_00  = $ex2_filed[0];
$ext2_01  = $ex2_filed[1];
$ext2_02  = $ex2_filed[2];

//연락가능한 전화번호2
$ex3_filed = explode("-",$write[wr_3]);
$ext3_00  = $ex3_filed[0];
$ext3_01  = $ex3_filed[1];
$ext3_02  = $ex3_filed[2];

//우편번호1
$ex6_filed = explode("-",$write[wr_6]);
$ext6_00  = $ex6_filed[0];
$ext6_01  = $ex6_filed[1];

//우편번호2
$ex7_filed = explode(",",$write[wr_7]);
$ext7_00  = $ex7_filed[0];
$ext7_01  = $ex7_filed[1];


//확장필드1
$p_nine = explode("|",$write[wr_9]);
$nine01 = $p_nine[0];
$nine02 = $p_nine[1];
$nine03 = $p_nine[2];
$nine04 = $p_nine[3];
$nine05 = $p_nine[4];

//확장필드2
$p_ten = explode("|",$write[wr_10]);
$ten01 = $p_ten[0];
$ten02 = $p_ten[1];
$ten03 = $p_ten[2];
$ten04 = $p_ten[3];
$ten05 = $p_ten[4];

?>

<script language="javascript">
// 글자수 제한
var char_min = parseInt(<?=$write_min?>); // 최소
var char_max = parseInt(<?=$write_max?>); // 최대
</script>

<!-- 김선용 2005.4 - ff(불여우) 에서는 innerhtml 사용시 폼이 <table> 아래에 있으면 인식하지 못합니다. -->
<form name="fwrite" method="post" action="javascript:fwrite_check(document.fwrite);" enctype="multipart/form-data" style="margin:0px;">
<input type=hidden name=null><!-- 삭제하지 마십시오. -->
<input type=hidden name=w        value="<?=$w?>">
<input type=hidden name=bo_table value="<?=$bo_table?>">
<input type=hidden name=wr_id    value="<?=$wr_id?>">
<input type=hidden name=sca      value="<?=$sca?>">
<input type=hidden name=sfl      value="<?=$sfl?>">
<input type=hidden name=stx      value="<?=$stx?>">
<input type=hidden name=spt      value="<?=$spt?>">
<input type=hidden name=sst      value="<?=$sst?>">
<input type=hidden name=sod      value="<?=$sod?>">
<input type=hidden name=page    value="<?=$page?>">


<?// if ($is_secret) { ?><input type=hidden value="secret" name="secret" <?=$secret_checked?> checked><?// } ?>

<table width="<?=$width?>" align=center cellpadding=0 cellspacing=0 bgcolor="#FFFFFF" style='padding-top:4px;'><tr><td>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr><td height="5" colspan=2 bgcolor=#F1F2F2></td></tr>


<tr>

<TABLE width='100%' border='1' bordercolor='#dbd7a2' cellpadding='4' cellspacing='0' style='border-collapse:collapse;'>
<col width="15%" style="font:bold;" bgcolor="#f8f7ee" align="center">
<col width="35%">
<col width="15%" style="font:bold;" bgcolor="#f8f7ee" align="center">
<col width="35%">

<tr>
<td>제목</td>
<td colspan="3"><input class=ed maxlength=80 size=50 name=wr_subject itemname="제목" required value="<?=$write[wr_subject]?>"></td>

</tr>

<tr>
<td>이름</td>
<td><input class=ed maxlength=16 size=16 name=wr_name itemname="이름" required value="<?=$name?>">

<input type=radio name="wr_4" value="남" <? if( $u=w || $write[wr_4] == "남")  echo ""; ?> > 남 &nbsp;
<input type=radio name="wr_4" value="여" <? if($write[wr_4] == "여")  echo ""; ?> > 여

<td>메일주소</td>
<? // if ($is_email) { ?>
<td><input class=ed maxlength=100 size=30 name=wr_email email itemname="이메일" value="<?=$email?>">
<? // } ?>
</tr>
<? // } ?>
<tr>
<td>일반전화</td>
<td>
<select name='ext2_00' class='ed'  itemname='전화번호'>
        <option value='02' <? if($ext2_00 == "02") echo "selected"; ?>>02</option>
        <option value='070' <? if($ext2_00 == "070") echo "selected"; ?>>070</option>
        <option value='031' <? if($ext2_00 == "031") echo "selected"; ?>>031</option>
        <option value='032' <? if($ext2_00 == "032") echo "selected"; ?>>032</option>
        <option value='033' <? if($ext2_00 == "033") echo "selected"; ?>>033</option>
        <option value='041' <? if($ext2_00 == "041") echo "selected"; ?>>041</option>
        <option value='042' <? if($ext2_00 == "042") echo "selected"; ?>>042</option>
        <option value='043' <? if($ext2_00 == "043") echo "selected"; ?>>043</option>
        <option value='051' <? if($ext2_00 == "051") echo "selected"; ?>>051</option>
        <option value='052' <? if($ext2_00 == "052") echo "selected"; ?>>052</option>
        <option value='053' <? if($ext2_00 == "053") echo "selected"; ?>>053</option>
        <option value='054' <? if($ext2_00 == "054") echo "selected"; ?>>054</option>
        <option value='055' <? if($ext2_00 == "055") echo "selected"; ?>>055</option>
        <option value='061' <? if($ext2_00 == "061") echo "selected"; ?>>061</option>
        <option value='062' <? if($ext2_00 == "062") echo "selected"; ?>>062</option>
        <option value='063' <? if($ext2_00 == "063") echo "selected"; ?>>063</option>
        <option value='064' <? if($ext2_00 == "064") echo "selected"; ?>>064</option>
      </select> -
      <input name='ext2_01' class=ed value='<?=$ext2_01?>' type='text' size='4' maxlength='4' onkeydown='onlyNumber(this);'  itemname='일반전화 두번째자리' class=input>  -
      <input name='ext2_02' class=ed value='<?=$ext2_02?>' type='text' size='4' maxlength='4' onkeydown='onlyNumber(this);'  itemname='일반전화 세번째자리' class=input>
</td>
<td>휴대전화</td>
<td>
<select name='ext3_00' class='ed'  itemname='휴대전화' required>
        <option value='010' <? if($ext3_00 == "010") echo "selected"; ?>>010</option>
        <option value='011' <? if($ext3_00 == "011") echo "selected"; ?>>011</option>
        <option value='016' <? if($ext3_00 == "016") echo "selected"; ?>>016</option>
        <option value='017' <? if($ext3_00 == "017") echo "selected"; ?>>017</option>
        <option value='018' <? if($ext3_00 == "018") echo "selected"; ?>>018</option>
        <option value='019' <? if($ext3_00 == "019") echo "selected"; ?>>019</option>
      </select> -
      <input name='ext3_01' class=ed value='<?=$ext3_01?>' type='text' size='4' maxlength='4' onkeydown='onlyNumber(this);'  itemname='휴대전화 두번째자리' required class=input>  -
      <input name='ext3_02' class=ed value='<?=$ext3_02?>' type='text' size='4' maxlength='4' onkeydown='onlyNumber(this);'  itemname='휴대전화 세번째자리' required class=input>
</td>
</tr>


<tr>
<td>답변방법</td>


<td colspan="3">
   
        <input type=radio name="wr_5" value="e메일" <? if($write[wr_5] == "e메일")  echo "checked"; ?> > e메일
<input type=radio name="wr_5" value="게시판" <? if($write[wr_5] == "게시판")  echo ""; ?> > 게시판
<input type=radio name="wr_5" value="전화" <? if($write[wr_5] == "전화")  echo ""; ?> > 전화

</td>

</tr>

<tr>
<td>문의내용</td>
<td colspan="3">
        <input type=radio name="wr_6" value="성장" <? if( $write[wr_6] == "성장")  echo "checked"; ?> > 성장
<input type=radio name="wr_6" value="웨딩" <? if($write[wr_6] == "웨딩")  echo ""; ?> > 웨딩
<input type=radio name="wr_6" value="돌잔치" <? if($write[wr_6] == "돌잔치")  echo ""; ?> > 돌잔치
    <input type=radio name="wr_6" value="스크린상영" <? if($write[wr_6] == "스크린상영")  echo ""; ?> > 스크린상영
    <input type=radio name="wr_6" value="프로덕션" <? if($write[wr_6] == "프로덕션")  echo ""; ?> > 프로덕션 <br>
<input type=radio name="wr_6" value="기타" <? if($write[wr_6] == "기타")  echo ""; ?> > 기타
  </td>
</tr>

<tr>
<td>통화가능시간</td>
<td colspan="3">
        <input type=radio name="wr_10" value="오전" <? if($write[wr_10] == "오전")  echo "checked"; ?> > 오전
<input type=radio name="wr_10" value="PM12시~2시" <? if($write[wr_10] == "PM12시~2시")  echo ""; ?> > PM12시~2시
<input type=radio name="wr_10" value="PM2시~4시" <? if($write[wr_10] == "PM2시~4시")  echo ""; ?> > PM2시~4시
<input type=radio name="wr_10" value="PM4시~6시" <? if($write[wr_10] == "PM4시~6시")  echo ""; ?> > PM4시~6시
<input type=radio name="wr_10" value="PM6시~8시" <? if($write[wr_10] == "PM6시~8시")  echo ""; ?> > PM6시~8시
</td>
</tr>
<tr>
<td>예정일</td>
<td colspan="3"><input class=ed maxlength=40 size=40 name=wr_8 itemname="예정일"  required value="<?=$write[wr_8]?>">#촬영문의시 시간표시</td>

</tr>


<tr>
<td>기타사항</td>
<td colspan=3 bgcolor="#ffffff">
궁금한 내용을 남겨주시면 원하는 연락방법으로 빠르게 답변 드리겠습니다.<br>
<table width=100% cellpadding=0 cellspacing=0>
        <tr>
            <td width=50% align=left valign=bottom>
                <span style="cursor: pointer;" onclick="textarea_decrease('wr_content', 10);"><img src="<?=$board_skin_path?>/img/up.gif"></span>
                <span style="cursor: pointer;" onclick="textarea_original('wr_content', 10);"><img src="<?=$board_skin_path?>/img/start.gif"></span>
                <span style="cursor: pointer;" onclick="textarea_increase('wr_content', 10);"><img src="<?=$board_skin_path?>/img/down.gif"></span></td>
            <td width=50% align=right><? if ($write_min || $write_max) { ?><span id=char_count></span>글자<?}?></td>
        </tr>
        </table>
        <textarea id=wr_content name=wr_content class=tx style='width:100%;word-break:break-all;' rows=3 itemname="기타사항" required
        <? if ($write_min || $write_max) { ?>onkeyup="check_byte('wr_content', 'char_count');"<?}?>><?=$content?></textarea>
        <? if ($write_min || $write_max) { ?><script language="javascript"> check_byte('wr_content', 'char_count');
</script><?}?>
        </td>
</tr>


</table>

</tr>


<?// if ($is_password) { ?>
<tr>
    <td>· 패스워드 <input class=ed type=password maxlength=20 size=15 name=wr_password itemname="패스워드" required <?=$password_required?>>
<font color="green">*수정시 사용할패스워 입니다.</font>
</td></tr>
<tr><td colspan=2 height=1 bgcolor=#e7e7e7></td></tr>
<?// } ?>


<!-- <? if ($is_homepage) { ?>
<tr>
    <td >· 홈페이지</td>
    <td><input class=ed size=50 name=wr_homepage itemname="홈페이지" value="<?=$homepage?>"></td></tr>

<? } ?> -->

<!-- <tr>
    <td >· 옵션</td>
    <td><? if ($is_notice) { ?><input type=checkbox name=notice value="1" <?=$notice_checked?>>공지&nbsp;<? } ?>
        <? if ($is_html) { ?><input onclick="html_auto_br(this);" type=checkbox value="<?=$html_value?>" name="html" <?=$html_checked?>><span class=w_title>html</span>&nbsp;<? } ?>

        <? if ($is_mail) { ?><input type=checkbox value="mail" name="mail" <?=$recv_email_checked?>>답변메일받기&nbsp;<? } ?></td></tr>
<tr><td colspan=2 height=1 bgcolor=#e7e7e7></td></tr>
 -->


<!-- <? if ($is_category) { ?>
<tr>
    <td >· 분류</td>
    <td><select name=ca_name required itemname="분류"><option value="">선택하세요<?=$category_option?></select></td></tr>
<tr><td colspan=2 height=1 bgcolor=#e7e7e7></td></tr>
<? } ?>  -->

<!-- <? if ($is_link) { ?>
<? for ($i=1; $i<=$g4[link_count]; $i++) { ?>
<tr>
    <td style='padding-left:20px; height:30px;'>· 링크 #<?=$i?></td>
    <td><input type='text' class=ed size=50 name='wr_link<?=$i?>' itemname='링크 #<?=$i?>' value='<?=$write["wr_link{$i}"]?>'></td>
</tr>
<tr><td colspan=2 height=1 bgcolor=#e7e7e7></td></tr>
<? } ?>
<? } ?> -->

<? if ($is_trackback) { ?>
<tr>
    <td style='padding-left:20px; height:30px;'>· 트랙백주소</td>
    <td><input class=ed size=50 name=wr_trackback itemname="트랙백" value="<?=$trackback?>">
        <? if ($w=="u") { ?><input type=checkbox name="re_trackback" value="1">핑 보냄<? } ?></td>
</tr>
<tr><td colspan=2 height=1 bgcolor=#e7e7e7></td></tr>
<? } ?>

<? if ($is_norobot) { ?>
<tr>
    <td style='padding-left:20px; height:30px;'>· <?=$norobot_str?>
    <input class=ed type=input size=10 name=wr_key itemname="자동등록방지" required>&nbsp;&nbsp;* 왼쪽의 글자중 <font color="red">빨간글자만</font> 순서대로 입력하세요.</td>
</tr>
<tr><td colspan=2 height=1 bgcolor=#e7e7e7></td></tr>
<? } ?>

<!-- <tr><td colspan=2 height=1 bgcolor=#000000></td></tr> -->
</table>

<table width="<?=$width?>" border="0" cellspacing="0" cellpadding="0" align="center">
<tr>
    <td width="100%" align="center" valign="top" bgcolor="#FFFFFF"><BR>
        <input type=image id="btn_submit" src="<?=$board_skin_path?>/img/ok_button.gif" border=0 accesskey='s'>
        <?php if($member[mb_level] >= 9) { ?>&nbsp;<img src="<?=$board_skin_path?>/img/list_btn.gif" name="btn_list" border=0 id="btn_list">
        <?php } ?><BR>
        <BR></td>
</tr>
</table>

</td></tr></table>
</form>

<!---- 숫자만 입력받는 스크립터 --//-->
<script>
function onlyNumber(objtext1){
var inText = objtext1.value;
var ret;

for (var i = 0; i < inText.length; i++) {
ret = inText.charCodeAt(i);
if (!((ret > 47) && (ret < 58))) {
alert("숫자만을 입력하세요");
objtext1.value = "";
objtext1.focus();
return false;
}
}
if (objtext1.value.length==8) {
document.form1.RNI_idnum2.focus() ;
}
return true;
}
</script>

<script language="javascript">
<?
// 관리자라면 분류 선택에 '공지' 옵션을 추가함
if ($is_admin)
{
    echo "
    if (typeof(document.fwrite.ca_name) != 'undefined')
    {
        document.fwrite.ca_name.options.length += 1;
        document.fwrite.ca_name.options[document.fwrite.ca_name.options.length-1].value = '공지';
        document.fwrite.ca_name.options[document.fwrite.ca_name.options.length-1].text = '공지';
    }";
}
?>

with (document.fwrite) {
    if (typeof(wr_name) != "undefined")
        wr_name.focus();
  // else if (typeof(wr_subject) != "undefined")
        //wr_subject.focus();
    else if (typeof(wr_content) != "undefined")
        wr_content.focus();

    if (typeof(ca_name) != "undefined")
        if (w.value == "u")
            ca_name.value = "<?=$write[ca_name]?>";
}

function html_auto_br(obj)
{
    if (obj.checked) {
        result = confirm("자동 줄바꿈을 하시겠습니까?\n\n자동 줄바꿈은 게시물 내용중 줄바뀐 곳을<br>태그로 변환하는 기능입니다.");
        if (result)
            obj.value = "html2";
        else
            obj.value = "html1";
    }
    else
        obj.value = "";
}

function fwrite_check(f)
{
    var s = "";

    if (char_min > 0 || char_max > 0)
    {
        var cnt = parseInt(document.getElementById('char_count').innerHTML);
        if (char_min > 0 && char_min > cnt)
        {
            alert("내용은 "+char_min+"글자 이상 쓰셔야 합니다.");
            return;
        } else if (char_max > 0 && char_max < cnt)
        {
            alert("내용은 "+char_max+"글자 이하로 쓰셔야 합니다.");
            return;
        }
    }

    if (typeof(f.wr_key) != "undefined") {
        if (hex_md5(f.wr_key.value) != md5_norobot_key) {
            alert("자동등록방지용 빨간글자가 순서대로 입력되지 않았습니다.");
            f.wr_key.focus();
            return;
        }
    }

    document.getElementById('btn_submit').disabled = true;
    <?php if($member[mb_level] >= 9) { ?> document.getElementById('btn_list').disabled = true; <? } ?>

    f.action = "./write_update.php";
    f.submit();
}
</script>

고맙습니다..
$wr_3 = "$ext3_00-$ext3_01-$ext3_01";    이렇게 되어 있었네요...
전, write_update.skin.php 는 생각지도 못했습니다..

여기서, 프로그램머 한테 유료로 의뢰해서 게시판도 수정하고 했었거든요..
그 의뢰 했던 사람한테 물어보니, 자기한테 의뢰 했던것은 이 부분이 아니기 때문에
해줄수 없다고 단칼에 짜르더라구요.. 아무리 저렴한 가격에 했어도 그렇지
너무한 생각이 들더라구요.. 그래서 , 반은 포기하고 질문 드렸는데..
이렇게 답변을 주셔서 해결하게 되었습니다.. 정말정말 고맙습니다..