gistfile1.txt

return array(
    'router' => array(
        'routes' => array(
            'admin' => array(
                'type'    => 'Segment',
                'options' => array(
                    'route'    => '/admin[/[:controller[/[:action]]]]',
                    'constraints' => array(
                        'controller' => '[a-zA-Z][a-zA-Z0-9_-]*',
                        'action'     => '[a-zA-Z][a-zA-Z0-9_-]*'
                    ),
                    'defaults' => array(
                        '__NAMESPACE__' => 'Admin\Controller',
                        'controller'    => 'Index',
                        'action'        => 'index',
                    ),
                ),
                'may_terminate' => true,
                'child_routes' => array(
                    'default' => array(
                        'type' => 'Wildcard',
                        'options' => array(
                        )
                    )
                )
            ),
        ),
    ),
);