Custom View Helper ZF2

Module.php

use MyModule\View\Helper\MyViewHelper;

class Module
{
    [...]

    public function getViewHelperConfig()
    {
    	return array(
            'factories' => array(
                'MyViewHelper' =>  function($sm) {
                    $router = $locator->get('Router');
                    $request = $locator->get('Request') 
                    $myViewHelper = new MyViewHelper($router, $request);

                    return $myViewHelper;
                },
             ),
        );
     }
}