private function _setSubMenuSlugForSorting($sSubMenuSlug)
{
$GLOBALS['_apf_sub_menus_to_sort'] = isset($GLOBALS['_apf_sub_menus_to_sort']) ? $GLOBALS['_apf_sub_menus_to_sort'] : array();
$GLOBALS['_apf_sub_menus_to_sort'][$sSubMenuSlug] = $sSubMenuSlug;
}