update cập nhập thông tin bài hát

application/controllers/backend/CmsTrack.php

@@ -46,7 +46,7 @@ class CmsTrack extends CI_Controller
         $this->load->view('backend/ajax/cms_track/list_track_view', $data);
     }
 
-    public function editTrack($contest_id, $id_user, $id_artist)
+    public function editTrack($contest_id, $id_user = '', $id_artist = '')
     {
         $this->_data['contest'] = $contest = $this->track_model->getById($contest_id, $id_user, $id_artist);
         $this->_data['track_artists'] = $track_artists = $this->track_model->getByIdUser('track_artists', $id_artist);