Change controller name via listener

module.config.php

<?php
return array(
    'router' => array('routes' => array(
        'api' => array(
            'type' => 'Segment',
            'options' => array(
                'route' => '/api/v[:version]/:controller[/:id]',
                'defaults' => array(
                    '__NAMESPACE__' => 'Api\V%VERSION%\Controller',
                    'controller'    => 'User', // just an example
                    'version'       => 1,
                ),
            ),
        ),
    )),

    'controllers' => array(
        'invokables' => array(
            'Api\V1\Controller\User'  => 'Api\Controller\UserController',
            'Api\V1\Controller\Group' => 'Api\Controller\GroupController',
            // etc.
        ),
    ),
);

Module.php

<?php

namespace My;

class Module
{
    public function onBootstrap($e)
    {
        $events = $e->getTarget()->getEventManager();
        $events->attach('route', array($this, 'onRoutePost'), -100);
    }

    public function onRoutePost($e)
    {
        $matches = $e->getRouteMatch();
        $controller = $matches->getParam('controller', '');
        if (!strstr($controller, '%VERSION%')) {
            return;
        }
        $matches->setParam('__CONTROLLER__', $controller);
        $version = $matches->getParam('version', 1);
        $controller = str_replace('%VERSION%', $version, $controller);
        $matches->setParam('controller', $controller);
    }
}