Top menu block not working in my Magento 1.9.0.1

Question

I am changing in app/code/core/mage/page/block/html/Topmenu.php in my magento but I cannot see result. but when i change in topmenu.phtml file then it displays changes. what is the issue? I am sure the Topmenu.php is the block file but menu still display. I don't know how is it possible. I am also trying in Navigation.php in Mage/catalog/block/navigation.php. it's also now working. how is it possible?

Means when I change code in Topmenu.php file's _gethtml() function, for example I write echo "hello"; then doesn't show. But when I am changing in topmenu. phtml file and write any code it displays in the navigation.

In header.phtml I call top menu using

<

?php echo $this->getChildHtml('topMenu') ?>



 topphml.phtml file code



 <?php echo "hello"; ?>
    <?php $_menu = $this->getHtml('level-top') ?>
    <?php if($_menu): ?>
    <div class="nav-container">

        <ul id="nav">
            <?php echo $_menu ?>
        </ul>
    </div>
    <?php endif ?>

Answer 1

In Magento 1.9.0.1 the Topmenu _gethtml() function is deprecated in favour of using a renderer.phtml

If your editing _getHtml() and the changes are not being show I think your theme is probably using this renderer.phtml file - rather than editing _getHtml() in Topmenu you probably need to edit /page/html/topmenu/renderer.phtml.

Answer 2

you need to copy the file

app/code/core/Mage/Catalog/Navigation.php

and place it in

app/code/local/Mage/Catalog/Navigation.php

and find the function renderCategoriesMenuHtml, this one is directly called from topmenu.phtml file so you need to start work from here. However, almost all the functions in Navigation.php are involved in creating the Menu so you need to work in them accordingly.

Answer 3

AS you are saying that your topmenu.php changes is not showing changes. For that you have to check that from which block its calling if its overridden by other module than it can't show your changes You can check which block is called from topmenu.phtml:

<?php echo get_class($this); ?>

Above line print the block class.