Line 73, Column 5: end tag for "ul" which is not finished </ul></li>

hatayı böyle gösteriyor.

Alıntı
Most likely, you nested tags and closed them in the wrong order. For example <p><em>...</p> is not acceptable, as <em> must be closed before <p>. Acceptable nesting is: <p><em>...</em></p>
Another possibility is that you used an element which requires a child element that you did not include. Hence the parent element is "not finished", not complete. For instance, in HTML the <head> element must contain a <title> child element, lists require appropriate list items (<ul> and <ol> require <li>; <dl> requires <dt> and <dd>), and so on.
Kodlar

<ol style="list-style: none; padding: 0; margin: 0px 0 0 0">

<? $xx=mysql_query("select * from xx where order by id asc"); 
while ($x=mysql_fetch_array($xx))  { 
$xx=$x['x'];
?>

<li><a title="xx" href="xx.html"><b><?=$x['x']?></b></a>

<ul type="square" style="padding-right: 4em;">

<?
$xx=mysql_query("select * from xx where xx = '$xx'");
while($xx=mysql_fetch_array($xx)) { ?>

<li><a title="xx" href="xx.html"><?=$x['xx']?></a></li>

<? }?>

</ul></li>

<?} ?></ol>
Yardımcı olurmusunuz arkadaşlar.