fix php template

Author: piotrantosik

book/http_cache.rst

@@ -915,7 +915,7 @@ matter), Symfony2 uses the standard ``render`` helper to configure ESI tags:
     .. code-block:: html+php
 
         <?php echo $view['actions']->render(
-            new ControllerReference('...:news', array('max' => 5)),
+            new \Symfony\Component\HttpKernel\Controller\ControllerReference('...:news', array('max' => 5)),
             array('strategy' => 'esi'))
         ?>
 

book/templating.rst

@@ -658,7 +658,7 @@ string syntax for controllers (i.e. **bundle**:**controller**:**action**):
         <!-- ... -->
         <div id="sidebar">
             <?php echo $view['actions']->render(
-                new ControllerReference(
+                new \Symfony\Component\HttpKernel\Controller\ControllerReference(
                     'AcmeArticleBundle:Article:recentArticles',
                     array('max' => 3)
                 )

cookbook/templating/PHP.rst

@@ -229,7 +229,7 @@ If you create a ``fancy`` action, and want to include it into the
 
     <!-- src/Acme/HelloBundle/Resources/views/Hello/index.html.php -->
     <?php echo $view['actions']->render(
-        new ControllerReference('AcmeHelloBundle:Hello:fancy', array(
+        new \Symfony\Component\HttpKernel\Controller\ControllerReference('AcmeHelloBundle:Hello:fancy', array(
             'name'  => $name,
             'color' => 'green',
         ))