리스트에서 여분필드 select로 변경 문의드립니다.

<select name="wr_7" id="wr_7_<?php echo $i;?>" class="ipfull" onchange="wr_7_chk('<?php echo $i;?>','<?php echo $list[$i]['wr_id'];?>',this.value);">
<option value="예약대기" <? if($list[$i]['wr_7'] == '') echo " selected "; ?>>예약대기</option>
<option value="예약완료" <? if($list[$i]['wr_7'] == '예약완료') echo " selected "; ?>>예약완료</option>
<option value="예약취소" <? if($list[$i]['wr_7'] == '예약취소') echo " selected "; ?>>예약취소</option>
<option value="예약보류" <? if($list[$i]['wr_7'] == '예약보류') echo " selected "; ?>>예약보류</option>
</select>

<a href="#" class="btn3" onclick="wr7_chk('<?php echo $i;?>','<?php echo $list[$i]['wr_id'];?>',$('#wr_7_<?php echo $i;?>').val()); return false;"><i class="fa fa-edit"></i> 변경</a>

<script>
            var wr7_chk = function(wr_num,wr_id,field) {
                $.ajax({
                    type:"post",
                    url:"<?php echo $board_skin_url;?>/wr7_up.php",
                    data:
                    {
                        wr_num : wr_num,
                        wr_id :wr_id,
                        wr_7 : field
                    },
                    dataType:"html",
                     success:function(res){
                        $("#wr_7_"+wr_num).val(res);
                            if(res){
                                alert(res+"으로 입력되었습니다");
                            }else{
                                alert("변경에 실패 하였습니다.");
                            }
                            location.reload();
                        }
                });
            }
</script>

<?php
include_once("./_common.php");

$write_table = $g5['write_prefix'].$_POST['bo_table'];
$sql = " update ".$write_table." set wr_7 = '".$_POST['wr_7']."' where wr_id = '".$_POST['wr_id']."' ";
sql_query($sql);
$sql = "select wr_7 from ".$write_table." where wr_id = '".$_POST['wr_id']."' ";
$row = sql_fetch($sql);

if($row['wr_7'])
  echo $row['wr_7'];
else
 echo '';
?>