class Mapa extends Admin_Controller {
    protected $record_id = 1;

    function  __construct() {
        parent::__construct();
        $this->auth_user();
        $this->initialize();
    }

    // ACCESIBLE DATA
    public function index(){
       $this->$record_id = 2;
    }

    // SAVING DATA
    public function save(){
        echo $this->record_id;  // return 1  .... It should return 2 that is thing what i really want ....
   }