Generate Category Tree in Magento

<?php

$rootDir = “”; //include root path

include($rootDir.”app/Mage.php”);

$rootcatId= Mage::app()->getStore()->getRootCategoryId();

$categories = Mage::getModel(‘catalog/category’)->getCategories($rootcatId);

function get_categories($categories) {

$array= ‘<ul>’;

foreach($categories as $category) {

$cat = Mage::getModel(‘catalog/category’)->load($category->getId());

$count = $cat->getProductCount();

$array .= ‘<li>’.

‘<a href=”‘ . Mage::getUrl($cat->getUrlPath()). ‘”>’ .

$category->getName() . “(“.$count.”)</a>n”;

if($category->hasChildren()) {

$children = Mage::getModel(‘catalog/category’)->getCategories($category->getId());

$array .= get_categories($children);

}

$array .= ‘</li>’;

}

return $array . ‘</ul>’;

}

echo get_categories($categories); ?>

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