function hookSeoBase()
{
foreach($GLOBALS['rlListingTypes']->types as &$type) {
if ($type['Category_search_dropdown']) {
$category_dropdown[] = $type['Key'];
}
}

if(!is_object($GLOBALS['rlSmarty']))
$GLOBALS['reefless']->loadClass('Smarty');

$GLOBALS['rlSmarty']->assign_by_ref('category_dropdown_types', $category_dropdown);
}
it did not work