How to add Attributes to navigation, sub-navigation

Is there a way to hard-code in links below some of the dropdown links on my site? Is it possible to do this without using the Admin? Since the Admin will just create those links as sub-categories. The links are actually to specific product attributes (ie different brands within my product line).

<ul>
       
      <li>Category A ( zencart php is sitting here)</li>
      <li>Category B ( zencart php is sitting here)</li>
      <li>Category C ( zencart php is sitting here)</li>  
      <li>Category D ( zencart php is sitting here)</li>
            <li>Sub Cat A ( zencart php is sitting here)</li>
            <li>Sub Cat A ( zencart php is sitting here)</li>
            <li>Sub Cat A ( zencart php is sitting here)</li>
            <li>Sub Cat A ( zencart php is sitting here)</li>
                    <! -- I want to hardcode a few links here --->
                    <! -- I want to hardcode a few links here --->
                    <! -- I want to hardcode a few links here --->
      <li>Category E ( zencart php is sitting here)</li>
      <li>Category F ( zencart php is sitting here)</li>  
</ul>

Maybe I should mention that it would be a level 2 sub-category.