bunu dener misin eröl

 <p align="left"><span class="style3">KATEGORİLER</span></td> 
        </tr> 
      </table>       
<?  
$sorgu=mysql_query("select * from z_inndir_ktgr order by id ");  
while ($satir=mysql_fetch_array($sorgu)) { 
echo '      <table width="271" border="0" bgcolor="#FBFFEC" class="sidebartop"> 
        <tr> 
          <td width="11">&nbsp;</td> 
          <td width="126" align="left" valign="middle"><a href="liste.php?ktgr1='.$satir[ad].'"><strong>'.$satir[ad].'</strong></a></td> 
          <td width="120" align="left" valign="middle"> 
                        <select name="select13" class="style1" style="width:200px;" onChange="MM_jumpMenu(\'parent\',this,0)">
            <option value="">Alt Kategori</option>
            ';
$sorgu1=mysql_query("select distinct ktgr2 from z_inndir WHERE (ktgr1='$satir[ad]') and (ktgr2!='') order by ktgr2 ");
while ($satir1=mysql_fetch_array($sorgu1)) { 
echo '<option value="liste1.php?ktgr1='.$satir[ad].'&ktgr2='.$satir1[ktgr2].'">'.$satir1[ktgr2].'</option>
                        ';
} 
echo '            </select> 
          </td> 
        </tr> 
      </table> ';

}
?></p>

olmadı birde eski tasarımı tam sayfa verir misin, şu ilk while döngüsünü nerde kapatmiş acaba onda.
yeni tasarımda tablonun peşine direk kapatmiş. belki kapanmamasi gerekiyordur.