Mvc\Router\Route::beforeMatch

$router->add('/login', array(
  'module'     => 'admin',
  'controller' => 'session'
 ))->beforeMatch(function ($uri, $route) {
   // Check if the request was made with Ajax
   if ($_SERVER['HTTP_X_REQUESTED_WITH'] == 'xmlhttprequest') {
      return false;
   }
     return true;
 });