Extending View?

Killishan thank you very much! It works   This is the code I wrote based on your suggestion. 

PHP Code:

        $path = APPPATH . 'views/themes/default/'; // {$this->theme}

        $view = \Config\Services::renderer($path, null, false); 

        return $view->setVar('data', $data)->render('customer/dashboard'); 


So now I can in views files use only <?= $this->extend('layout') ?> for extending the view.