Manually add a link in a WP header menu?

I'm looking to manually add a link in the top main menu bar of my Wordpress site. It's within a UL tag. I could never figure out how to do this...here's the code that calls the "Home" page and all categories to appear in the main menu. All I want to do is manually add one more link in there, that points to a specific URL:

	<div id="categories">
		<div class="container">
			<ul id="category-list" class="clearfix">
				<li<?php if(is_home()): ?> class="current-cat"<?php endif; ?>><a href="<?php bloginfo('url'); ?>">Home</a></li>

[B]<!-- THIS IS WHERE I WANT TO PUT A LINK -->[/B]

				<?php wp_list_categories('title_li='); ?>

			</ul>
		</div>
	</div>

Code (markup):

As you may have imagined, if I simply put a regular link in there, it does not "take" the formatting of the CSS UL formatting (it just appears in default font, un-aligned).

Please help out with this if you know - will definitely give rep for your help!

 

This is how I did it:

<li class="first"><a  href="http://www.[I]whateveritis.com[/I]/"title="Some Kind of Text">Name of the Link</a></li>

Code (markup):

 

Find out the class your list uses, by viewing the source of the displayed page.
then

<li class="classhere"><a href="http://www.link.com" target="_parent">Link Name</a>

Code (markup):

 

THANKS!!! I had a feeling it would be something stupid and simple, like that "class=" deal.