Drop down menu from titles

Hi,
How do you create a drop down from the entries of a category?

http://www.contrecoups.com/work

This is the code i use to display only the titles entries of WORK category in my sidebar. But i want to have those be in a drop down menu instead of just displayed, as i will add many more entries soon adn don’t want people to have to scroll… Or if anyone has a better idea… thanks

	<li id="categories">
	<br />
	<span class="navlinks"><a href="http://contrecoups.com/work/?cat=1">News</a></span><br />
	<span class="navlinks"><a href="http://contrecoups.com/work/?cat=10">Blog</a></span>
	<h2>Work:</h2>
		<ul>
		<!--<a href="<?php the_permalink() ?>" rel="bookmark">&raquo;<?php the_title(); ?></a>-->
 <?php
 $myposts = get_posts('numberposts=500&offset=0&category=2');
 foreach($myposts as $post) :
 ?>
    <a href="<?php the_permalink(); ?>"><?php the_title(); ?></a><br />
 <?php endforeach; ?>

		<!-- <?php wp_list_cats(); ?> -->

		</ul>
 	</li>