Cloning category?

magento_category_copy.php

<?php
// category source
$category_id = '3';
$category = Mage::getModel('catalog/category')->load($category_id);
$category_products = $category->getProductsPosition();

// clone category
$category_copy = clone $category;
$category_copy
    ->setId(null)
    ->setIsActive(0)
    ->seturl_key('')
    ->setName($category->getName() . ' (copy)')
    ->setPostedProducts($category_products)
    ->save();