Phpstorm $this->model_name->method() highlighted

Thanks to both of you, but now the other problem are the variables passed to the view:
Controller:
     

PHP Code:

 $data['curr_url'] = current_url();
 $this->load->view('test_view', $data); 


View:
       

PHP Code:

/**
* @see Main::index()
* @var Main $curr_url
*/

echo $curr_url 


It highlights the $curr_url and it says that there is no "__toString" method in Main controller class.