In my case I want create a head navigation and main navigation with Zend_Navigaiton with plugins. The head and main naviagtion is created my themselves. So they have no connection with each other. So it would be good that Zend_Navigation supports more than one container because I also want use all the functionality of this component.

Here is some example code how I want create these navigations. Here I load the data from a model in the background.

head navigation:

<?php

    class Plugin_NavigationHead extends Zend_Controller_Plugin_Abstract {

        public function preDispatch(Zend_Controller_Request_Abstract $request){

            $container = new Zend_Navigation();

$view = Zend_Layout::getMvcInstance()->getView();            

            $container->addPage(array("label" => "MainMenu",
                                         "module" => "default",
                                           "controller" => "index",
                                         "action" => "index"));

            $container->addPage(array("label" => "Submenu",
                                               "module" => "default",
                                            "controller" => "index",
                                          "action" => "index"));

            $container->addPage(array("label" => "NextSubMenu",
                                               "module" => "default",
                                            "controller" => "index",
                                          "action" => "index"));

            $view->navigation_head = $view->navigation($container)
                                     ->breadcrumbs()
                                  ->setSeparator(" -> ")->render();

    }
    }

?> 

main navigation:

<?php

    class Plugin_NavigationMain extends Zend_Controller_Plugin_Abstract {

        public function preDispatch(Zend_Controller_Request_Abstract $request){

$view = Zend_Layout::getMvcInstance()->getView();

            $container = new Zend_Navigation();
                        
            $container->addPage(array("label" => "Main-Menu",
                                        "module" => "default",
                                         "controller" => "index",
                                     "action" => "index"));

            $container->addPage(array("label" => "Main-Submenu",
                                        "module" => "default",
                                     "controller" => "index",
                                        "action" => "index"));

            $view->navigation_head = $view->navigation($container)->menu()->render();

    }
    }

?> 

in my layout file I try to view these navigation but like I wrote above only the main menu is rendered.

layout.phtml file:

<?= $this->navigation_main; ?>
<?= $this->navigation_head; ?>

But the problem is that only the main menu is rendered but not the breadcrumbs navigation. This support of different containers should only be activated if the navigation()-method was set more than one time. For the other case everything could be like now.