<?php 
echo '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
$sorgu=mysql_query("select * from kategoriler order by katid desc");
while($x=mysql_fetch_array($sorgu)){
    echo '<li><a class="kategoria" href="kategori.php?id='.$x["katid"].'">'.$x["katadi"].'</a></li>';
    }
?>