Folgenden Code suchen:
// reset var

Danach folgendes Einfügen:
require_once (DIR_FS_INC.'xtc_get_domains.inc.php'); 

Folgenden Code suchen:
$categories_query = "select c.categories_id,
                                           cd.categories_name,
                                           c.parent_id from ".TABLE_CATEGORIES." c, ".TABLE_CATEGORIES_DESCRIPTION." cd
                                           where c.categories_status = '1'
                                           and c.parent_id = '0'
                                           ".$group_check."
                                           and c.categories_id = cd.categories_id
                                           and cd.language_id='".(int) $_SESSION['languages_id']."'
                                           order by sort_order, cd.categories_name";

Danach mit folgendem ERSETZEN:
$categories_query = "select c.*, cd.categories_name from ".TABLE_CATEGORIES." c, ".TABLE_CATEGORIES_DESCRIPTION." cd
                                           where c.categories_status = '1'
                                           and c.parent_id = '0'
                                           ".$group_check."
                                           and c.categories_id = cd.categories_id
                                           and cd.language_id='".(int) $_SESSION['languages_id']."'
                                           order by sort_order, cd.categories_name";


Folgenden Code suchen:
while ($categories = xtc_db_fetch_array($categories_query, true)) {
	$foo[$categories['categories_id']] = array ('name' => $categories['categories_name'], 'parent' => $categories['parent_id'], 'level' => 0, 'path' => $categories['categories_id'], 'next_id' => false);
	if (isset ($prev_id)) {
		$foo[$prev_id]['next_id'] = $categories['categories_id'];
	}
	$prev_id = $categories['categories_id'];
	if (!isset ($first_element)) {
		$first_element = $categories['categories_id'];
	}
}

Danach mit folgendem ERSETZEN:
while ($categories = xtc_db_fetch_array($categories_query, true)) {
 if(xtc_check_domain($categories['categories_domain'])){
	$foo[$categories['categories_id']] = array ('name' => $categories['categories_name'], 'parent' => $categories['parent_id'], 'level' => 0, 'path' => $categories['categories_id'], 'next_id' => false);
	if (isset ($prev_id)) {
		$foo[$prev_id]['next_id'] = $categories['categories_id'];
	}
	$prev_id = $categories['categories_id'];
	if (!isset ($first_element)) {
		$first_element = $categories['categories_id'];
	}
 }
}