Find all Product root categories of a store (Magento 1.7)

Question

I have two websites and am looking to create a dynamic Nav Bar that works across both store fronts.

Because I'm trying to make it dynamic I'll most likely load the current store_id then find the collection related to that.

Is there a way I can list the names of all the Product root categories for a given website?

and is there a way to get all the sub categories of the website?

Here is a picture of the categories I'm talking about as an example:

Let me know if you have any questions or need clarification!

Answer 1

I solved it! For those curious,

First I grabbed the current store I'm in and the root category Ids

$store = Mage::app()->getStore();
$categoryId = $store->getRootCategoryId();

Then I loaded the Ids for root categories for the store and separated them into an array to sort through

$categories = Mage::getModel('catalog/category')->load($categoryId);
$categoryChildren = $categories->getChildren();
$categoryArray = explode(',', $categoryChildren);

Then I looped through them and grabbed their info

foreach($categoryArray as $category){
            $Category = Mage::getModel('catalog/category')->load($category);
            echo $Category->getName();
            echo "\r\n";
            echo $Category->getUrl();
            echo "\r\n";
        }