Display Category Images in Navigation

To display the images of categories in the main navigation menu, we need to update two files.

Firstly in Model file. (/app/code/core/Mage/Catalog/Model/Observer.php)

Update following code in Function Name: _addCategoriesToMenu

$categoryData = array( 
        'name' => $category->getName(),
        'id' => $nodeId,
        'url' => Mage::helper('catalog/category')->getCategoryUrl($category),
        'is_active' => $this->_isActiveMenuCategory($category),
        'thumbnail' => Mage::getModel('catalog/category')->load($category->getId())->getThumbnail()
);

Then go into Html folder. (app/code/core/Mage/Page/Block/Html/Topmenu.php)

Update the following line of code at line 128 in

Function name: _getHtml

$urls = Mage::getBaseUrl('media').'catalog/category/'.$child->getData('thumbnail');
$img = '<img src="'.$urls.'" />';

$html .= '
_getRenderedMenuItemAttributes($child) . '>';
$html .= '<a href="' . $child->getUrl() . '" ' . $outermostClassCode . '>'
        . $this->escapeHtml($child->getName()) . '  '.$img.' </a>';