public function actionShow()
 {
     $id = $_GET['id'];
     $auth = Auth::checkAuth();
     if ($auth) {
         $user = Users::findOneByPK($auth);
         $user->getProfile();
     }
     $courses = Courses::findAllByColumn('parent_id', $id);
     $view = new View();
     $view->user = $user;
     $view->courses = $courses;
     //  $view->user_login = $user->user_login;
     // $view->user_group = $user->user_group;
     $parent_course = Courses::findOneByPK($id);
     $crumbs = Breadcrumbs::getCrumbs($parent_course);
     $view->crumbs = $crumbs;
     $view->page_title = $parent_course->name;
     $view->display('header.php');
     if (isset($id)) {
         $view->display('courses/child-list.php');
     } else {
         $view->display('courses/list.php');
     }
     $view->display('footer.php');
 }
 public function actionLesson()
 {
     $auth = Auth::checkAuth();
     if ($auth) {
         $user = Users::findOneByPK($auth);
         $user->getProfile();
     }
     $lesson_id = $_GET['lesson_id'];
     $view = new View();
     //  $view->user_login = $user->user_login;
     // $view->user_group = $user->user_group;
     if (isset($lesson_id)) {
         $lesson = Lessons::findOneByPK($lesson_id);
         $crumbs = Breadcrumbs::getCrumbs($lesson);
         $view->page_title = $lesson->name;
         $view->crumbs = $crumbs;
         $view->user = $user;
         $view->display('header.php');
         $view->display('lessons/lesson.php');
         $view->display('footer.php');
     } else {
         throw new ControllerException('Сожалеем, такого урока не существует', '404');
     }
 }