public function excel()
    {
        $data['menu'] = $this->Menu_model->getAllMenu();
        require(APPPATH. 'PHPExcel-1.8/Classes/PHPExcel.php');
        require(APPPATH. 'PHPExcel-1.8/Classes/PHPExcel/Writer/Excel2007.php');

        $object = new PHPExcel();

        $object->getProperties()->setCreator('Hobiholidays');
        $object->getProperties()->setLastModifiedBy('Hobiholidays');
        $object->getProperties()->setTitle('Daftar Menu');

        $object->setActiveSheetIndex(0);

        $object->getActiveSheet()->setCellValue('A1', 'NO');
        $object->getActiveSheet()->setCellValue('B1', 'MENU');

        $baris = 2;
        $no = 1;

        foreach ($data['menu'] as $m) {
            $object->getActiveSheet()->setCellValue('A'.$baris, $no++);
            $object->getActiveSheet()->setCellValue('B'.$baris, $m['menu']);

        $baris++;
        }

       $filename = "Data_menu" . '.xlsx';

       $object->getActiveSheet()->SetTitle('Data Menu');

       header('Content-Type: application/
       vnd.openxmlformats-officedocument.spreadsheetml.sheet');
       header('Content-Disposition: attachment;filename="'.$filename.'"');
       header('Cache-Control: max-age=0');

       $writer = PHPExcel_IOFactory::createwriter($object, 'Excel2007');
       $writer->save('php://output');

       exit;

    }