어떻게 해야하나요??

예를들어서..

글쓰기 화면에서...
여분필드를 쪼개고 나서..
<tr>
    <td><table width="680" border="0" cellpadding="3" cellspacing="3" bgcolor="FD87A8">
      <tr>
        <td bgcolor="#FFFFFF"><table width="680" height=90 border="0" cellspacing="0" cellpadding="0">
          <tr>
            <td valign=top width="200" style="padding:10 0 0 15"><img src="<?=$board_skin_path?>/board_img/logo.gif" width="148" height="32"></td>
            <td><table width="460" border="0" align="center" cellpadding="0" cellspacing="0">
              <tr>
                <td width="35" height=40><img src="<?=$board_skin_path?>/board_img/1_tit1.gif" width="34" height="13"></td>
                <td colspan="3" style="padding:0 0 0 15"><input class="field" style="width:100%;" name=wr_subject id="wr_subject" itemname="상호명" required value="<?=$subject?>"></td>
              </tr>
              <tr>
                <td height=40><img src="<?=$board_skin_path?>/board_img/1_tit2.gif" width="34" height="13"></td>
                <td width="195" style="padding:0 0 0 15"><input class=field style="width:80%;" name=ext7_00 itemname="연락처" required value="<?=$ext7_00?>"></td>
                <td width="35"><img src="<?=$board_skin_path?>/board_img/1_tit3.gif" width="35" height="13"></td>
                <td width="195" style="padding:0 0 0 15"><input class=field style="width:80%;" name=ext7_01 itemname="주소" required value="<?=$ext7_01?>"></td>
              </tr>
            </table></td>
          </tr>
        </table></td>
      </tr>
이렇게 글 쓰기 화면을 만들고
<tr>
                <td height=40><img src="<?=$board_skin_path?>/board_img/1_tit2.gif" width="35" height="13"></td>
                <td style="padding:0 0 0 15" width=100><?=$ext7_00?></td>
                <td><img src="<?=$board_skin_path?>/board_img/1_tit3.gif" width="34" height="13"></td>
                <td style="padding:0 0 0 15"><?=$ext7_01?></td>
              </tr>
이렇게 하면 보여지는데..

글 쓰기 화면에서
여분필드 쪼갠거..
ext7_00
이 항목을 입력을 하면
view화면에서 보여지게 되고..

항목을 입력하지 않으면..
보여지지 않게 할려고 하는데..
어떻게 해야할까요?ㅠㅜ