public static function get_general_data()
 {
     if (!self::$general_data) {
         $array = self::get_page_specific_data('', '', '');
         $newArray = array();
         if (count($array)) {
             foreach ($array as $key => $subArray) {
                 $newArray[$key] = $key;
             }
         }
         self::$general_data = $newArray;
     }
     return self::$general_data;
 }