lol, magento

gistfile1.php

<?php
/* @var $tree Mage_Catalog_Model_Resource_Category_Tree */
$tree = Mage::getResourceModel('catalog/category_tree');

/* 594 = 616, 597 = 856 */
$storeCategories = $this->getStoreCategories(); 
$storeCategories->delete($storeCategories->searchById(594));
$storeCategories->delete($storeCategories->searchById(597));

$node = $tree->loadNode(616);
$node->setPathId('1/2/594/616');
$node->setName(Mage::getModel('catalog/category')->load(616)->getName());
$storeCategories->add($node);

$node = $tree->loadNode(856);
$node->setName(Mage::getModel('catalog/category')->load(856)->getName());
$node->setPathId('1/2/597/856');
$storeCategories->add($node);
?>