CSS Dropdown menu for the header- With Categories!

[Still Crazy]

Me Again!

I would like to add a manufacturers list to the drop down menu such that each manufacturers products could be listed in a similar manner to the categories drop down.

I could add the new category in the HTML:

<li class="submenu">MAMUFACTURERS</a>
  <ul class="level2">
    <li><a href="index.php?main_page=index&amp;cPath=2">This Manufacturer</a></li>
    <ul class="level3">
        <li class="submenu"> <a href="index.php?main_page=index&amp;cPath=4">Product 1</a></li>
        <li class="submenu"> <a href="index.php?main_page=index&amp;cPath=4">Product 2</a></li>
        <li class="submenu"> <a href="index.php?main_page=index&amp;cPath=4">Product 3</a></li>
      </ul>
    <li class="submenu"><a href="index.php?main_page=index&amp;cPath=3">That Manufacturer</a> 
      <ul class="level3">
        <li class="submenu"> <a href="index.php?main_page=index&amp;cPath=4">Product 1</a></li>
        <li class="submenu"> <a href="index.php?main_page=index&amp;cPath=4">Product 2</a></li>
        <li class="submenu"> <a href="index.php?main_page=index&amp;cPath=4">Product 3</a></li>
      </ul>
    </li>
  </ul>
</li>

But longer term that would be difficult to maintain. I had hoped to be able to assign products to manufacturers in some way rather than input each one individually, and the whole menu be built dynamically.

So, what is the best "Zen like " way to do this?

Many thanks!