Magento - Move Code from view.phtml to tabs.phtml

Question

I have this code in my view.phtml file which displays a list of all the products categories:

<?php
    $catIds = $_product->getCategoryIds();

    foreach($catIds as $catId) {
        $category = Mage::getModel('catalog/category')->load($catId);
        echo $category->getName();
    }
?>

Instead of displaying the category list in view.phtml I would like to display it in tabs.phtml. Tabs.phtml displays additional product information at the bottom of the product page.

I tried doing a direct copy and paste but this didn't work. Does anyone know how I can get this code to work in tabs.phtml?