How to programmatically code a block to show taxonomy vocabulary as an unordered list?

Question

I'm trying to build a menu using a taxonomy vocabulary with its hierarchical structure. I don't want to use any module to do it.

In this page I see that I can grab the terms for a given vocabulary and do it programmatically http://drupal.org/node/113651

But I need some help to star coding it.

I have a Taxonomy called: Products (the tid is : 2)

Products has the following terms and hierarchical structure:

--Cars
----Volvo
----Ford
--Games
----Football
----Rugby
----Videogames
------Pacman
------Call of Duty

PHP CODE to generate:

<ul>
    <li>Cars
        <ul>
            <li>Volvo</li>
            <li>Ford</li>
        </ul>
    </li>
    <li>Games
        <ul>
            <li> Football </li>
            <li> Rugby </li>
            <li>Cars
                <ul>
                    <li> Pacman </li>
                    <li>Call of Duty</li>
                </ul>
            </li>
        </ul>
    </li>
</ul>

Answer 1

That's something I have put together for myself in the past. I posted the code on the Drupal taxonomy_get_tree() API page where you can get a copy for yourself. The core part of the code is usable with Drupal 6 as well (some smaller modifications are needed to make it work though).