Magento Set All Categories to “Is Anchor = Yes”

<?php
error_reporting(E_ALL);
ini_set(‘display_errors’, ‘1’);

// Load Up Magento Core
define(‘MAGENTO’, realpath(”));

require_once(MAGENTO . ‘/app/Mage.php’);

$app = Mage::app();

$categories = Mage::getModel(‘catalog/category’)
->getCollection()
->addAttributeToSelect(‘*’)
->addAttributeToFilter(‘is_anchor’, 0)
->addAttributeToFilter(‘entity_id’, array(“gt” => 1))
->setOrder(‘entity_id’)
;

foreach($categories as $category) {
echo $category->getId() . “\t” . $category->getName() . “\n”;
$category->setIsAnchor(1);
$category->save();
}
?>