Magento - Return id, name & url of product categories

gistfile1.php

<?php
// Get Magento categories
function get_magento_categories() {
	require_once 'app/Mage.php'; 
	Mage::app();
	$category = Mage::getModel('catalog/category'); 
	$tree = $category->getTreeModel(); 
	$tree->load();
	$ids = $tree->getCollection()->getAllIds(); 
	$categories = array();
	if ($ids){ 
		$i=1;
		foreach ($ids as $id){ 
			$cat = Mage::getModel('catalog/category'); 
			$cat->load($id); 
			if($cat->getName() !== "Root Catalog" && $cat->getName() !== "Store") { // My lazy way of hiding root categories
				$categories[$i]['id'] = $id;
				$categories[$i]['name'] = $cat->getName();
				$categories[$i]['url'] = $cat->getUrl();
				$i++;
			}
		} 
	}
	return $categories;
}
?>