public static function listAvailpages()
 {
     $pagelist = Admin_ModulPage::all();
     $arrayPages = array();
     foreach ($pagelist as $value) {
         $regnav = Admin_Navpage::where('modulpageid', '=', $value->modulpageid)->get();
         if (isset($value->action) && $value->actionalias != '' && $value->visible == 1 && empty($regnav)) {
             $arrayPages[$value->modulpageid] = $value->actionalias;
         }
     }
     return $arrayPages;
 }