view 스킨페이지에서 관리자가 메모형식으로 쓸려고하는데... 채택완료

<form name="fview_admin" id="fview_admin" action="./admin_buy_update.php" onsubmit="return fview_admin_submit(this);" method="post">
        </form>
    <input type="hidden" name="sfl" value="<?php echo $sfl ?>">
    <input type="hidden" name="stx" value="<?php echo $stx ?>">
    <input type="hidden" name="spt" value="<?php echo $spt ?>">
    <input type="hidden" name="sca" value="<?php echo $sca ?>">
    <input type="hidden" name="page" value="<?php echo $page ?>">
    <input type="hidden" name="sw" value="">
 <div id="v_memo">
 <table>
     <tbody>
      <tr>
       <th>처리상태</th>
        <td>
                <select name="wr_8" id="sel">
          <option  style="color:#F00" value="신규접수"<?php if($view['wr_8']=="신규접수") echo "selected"; ?> >신규접수</option>
          <option  style="color:#0C3;"  value="처리중" <?php if($view['wr_8']=="처리중") echo "selected"; ?>>처리중</option>
          <option style="color:#999;" value="처리보류" <?php if($view['wr_8']=="처리보류") echo "selected"; ?>>처리보류</option>
          <option  style="color:#099;" value="처리완료" <?php if($view['wr_8']=="처리완료") echo "selected"; ?>>처리완료</option>
            </select>   
                </td>
               <td rowspan="2"><input type="submit" style="width:100px; float:right; padding: 25px 0px 28px 0px; margin-top:10px;" class="btn_submit" value="관리자 수정">               </td>
   </tr>
            <tr>
       <th>관리</th>
        <td width="75%"><input type="text" name="wr_7" value="<?php echo $view['wr_7'] ?>"  id="wr_7" class="frm_input" style="width:100%;" maxlength="100"></td>
   </tr>
     </tbody>
    </table>
    </div>
        </form>​

이게 view스킨에 넣은값인데..

문제는 update부분인데

     // 실제 번호를 넘김
        sql_query($sql);
                   set wr_7 = '{$_POST['wr_7']}',
       wr_8 = '{$_POST['wr_8']}'
       where wr_id = '????????'
        ";
        sql_query($sql);​

wr7값, 8값은 다 가는데

wr_id값을 머로 설정해야하나요;;;