Render Top Level Categories as well as ALL Subcategories of a Specific store

Question

I am able to get the list of categories of a current store as menu items using code:

<?php $_helper = Mage::helper('catalog/category') ?>
<?php $_categories = $_helper->getStoreCategories() ?>
<?php $currentCategory = Mage::registry('current_category') ?>
<?php if (count($_categories) > 0): ?>
        <?php foreach($_categories as $_category): ?>
            <li>
                <a href="<?php echo $_helper->getCategoryUrl($_category) ?>">
                    <?php echo $_category->getName() ?>
                </a>
                <?php $_category = Mage::getModel('catalog/category')->load($_category->getId()) ?>
                <?php $_subcategories = $_category->getChildrenCategories() ?>
                <?php if (count($_subcategories) > 0): ?>
                    <ul>
                        <?php foreach($_subcategories as $_subcategory): ?>
                            <li>
                                <a href="<?php echo $_helper->getCategoryUrl($_subcategory) ?>">
                                    <?php echo $_subcategory->getName() ?>
                                </a>
                            </li>
                        <?php endforeach; ?>
                    </ul>
                <?php endif; ?>
            </li>
        <?php endforeach; ?>
<?php endif; ?>

But, how do I get top level categories as well as all subcategories of a specific store using store id? I want to include main store categories as menu items in the second store.

Answer 1

See the file app\code\core\Mage\Catalog\Helper\Category.php on getStoreCategories() method. You can copy this to your own helper and modify the first line.

$parent     = Mage::app()->getStore($your_store_id)->getRootCategoryId();

Set $your_store_id variable to store_id of your choice.