Digging into the 1.9 RWD nav menu, I am fiddling with Varien_Data_Tree and Varien_Data_Tree_Node - I haven't worked with these classes directly before and they seem unfinished as there are several empty methods in the classes.

Using an observer on the page_block_html_topmenu_gethtml_before event, I am able to add a new item to the menu using:

    $event = $observer->getEvent();
    $menu = $event->getMenu();
    $nodeData = array(
        'name'      => 'My Node',
        'id'        => 'my_node',
        'url'       => 'My-Url.html',
        'is_active' => false
    $node = new Varien_Data_Tree_Node($nodeData, 'my-node', new Varien_Data_Tree());

As expected, I see a new nav menu item on the front-end listed after any other nav items already built; however, I would like to position this node so that it is shown before or after any other items (such as how before="-" after="-" are used in layout XML).

How can I adjust the position of items added to the nav menu in this fashion?

1 Answer 1


Marius to the rescue! Its not an elegant solution but seems to be the only approach. Since its a matter of getting the existing tree items, temporarily storing the data, removing them and then readding the existing items with the newly inserted one before.

Taken from: https://magento.stackexchange.com/a/7361/69

public function addItemsToTopmenuItems($observer){
    //get the menu object -Type Varien_Data_Tree_Node
    $menu = $observer->getMenu();
    //get the tree object in the menu -type Varien_Data_Tree
    $tree = $menu->getTree();
    //get current page handler
    $action = Mage::app()->getFrontController()->getAction()->getFullActionName();
    $brandNodeId = 'category-node-brand';
    //set the node id, label and url
    $data = array(
        'name' => Mage::helper('catalog')->__('Brands'),
        'id' => $brandNodeId,
        'url' => Mage::getUrl('brands'),
        'is_active' => ($action == 'brands')
    //create a node object
    $brandNode = new Varien_Data_Tree_Node($data, 'id', $tree, $menu);
    //temporary array with nodes
    $menuItems = array();
    //my first menu item
    $menuItems[] = $brandNode;
    //loop through existing menu items, add them to the array and remove them from the    menu
    foreach ($menu->getChildren() as $child){
        //add the item to the temp array
        $menuItems[] = $child;
        //remove item from the menu
        //I need to add a new menu item after the category with id 6
        //don't worry the id is not hard coded. it comes from a config setting
        //I just added 6 here to make it easier to read
        if ($child->getId() == 'category-node-6'){
            //create a new node as $brandNode called $newNode
            //add the node to my temp array
            $menuItems[] = $newNode;
    //add other nodes at the end of my temp array
    //recreate the menu in the order I need
    foreach ($menuItems as $child){

Also it may be worth mentioning that Varien_Data_Tree_Node_Collection implements ArrayAccess.

  • Don't know how I missed that question. This is pretty much what I was suspecting I would need to do.
    – pspahn
    Commented Nov 13, 2014 at 20:05
  • I feel like there might be a better solution if a simple sort_order is added to each node and then rearrange the menu's array inside the topmenu/renderer.phtml template based on sort_order.
    – pspahn
    Commented Nov 13, 2014 at 20:06
  • May offer a better elogant solution: github.com/OpenMage/magento-mirror/blob/magento-1.9/lib/Varien/…
    – B00MER
    Commented Nov 13, 2014 at 20:15
  • 1
    @B00MER. The move method you linked works for tree behavior with links to the database. It would be nice to have such a method for non-db related trees.
    – Marius
    Commented Nov 14, 2014 at 7:41

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