--- index.php.old	2008-05-20 15:54:25.996562104 +0200
+++ index.php	2008-05-20 15:55:35.927930920 +0200
@@ -387,13 +387,7 @@
         echo '</td>';
 
         echo '<td align="left">';
-        $tempdisplaylist = $displaylist;
-        unset($tempdisplaylist[$category->id]);
-        foreach ($parentslist as $key => $parents) {
-            if (in_array($category->id, $parents)) {
-                unset($tempdisplaylist[$key]);
-            }
-        }
+        $tempdisplaylist = remove_self_and_children_categories($displaylist, $parentslist, $category->id);
         popup_form ("index.php?move=$category->id&amp;sesskey=$USER->sesskey&amp;moveto=", $tempdisplaylist, "moveform$category->id", $category->parent, '', '', '', false);
         echo '</td>';
         echo '</tr>';