อยากจะสอบถามเรื่องการใช้ loop while วนซ้ำ 2 รอบหน่อยครับ

<?
$sql="select * from list_detail where id_list_detail='$i' ";
$result=mysql_db_query($dbname,$sql);
while($rs=mysql_fetch_array($result);
$id_list_detail=$rs[id_list_detail];
$name=$rs[name];
?>
<li>
<dl class="nav-gallery2">
<dt><a href="#"><?php echo $name; ?></a></dt>
<?php 
$sql2="select * from detail where id_list_detail='$id_list_detail' ";
$result2=mysql_db_query($dbname,$sql2);
while ($rs2=mysql_fetch_array($result2)) {
$id_detail=$rs2[id_detail];
$head=$rs2[head];
?>
<dd><a href="index.php?name=main&file=show&id_detail=<?php echo $id_detail;?>" title="<?php echo $head;?>"><?php echo $head;?></a></dd> 
<?php
}
?>
</dl>
</li>
<?php
}
?>
</ul>
</div>