2 columns posts (side by side)

hi everyone..

i need help to make my post in 2 columns.. does anyone had done this before..

im using this code to show my post

<div id="content_news_header">
	<div class="h1"><?php echo date('F jS, Y'); ?></div>
</div>
<div id="category_content">
                    <a href="#"><div id="cat_header">FASHION</div></a>
                    <div id="cat_content">
					<?php
                     $rando_posts = get_posts('numberposts=20&amp;cat=6&amp;column=2');
                     foreach( $rando_posts as $post ) :
					 setup_postdata($post);
					 ?>
                         <div id="news_storytitle">
							<div class="h2">
							<?php the_time('F j, Y') ?></div><span class="h5"><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a></span>
                            </div>
                        <div class="news_storycontent">
						<?php the_excerpt('Read more..'); ?>
                        </div>
                     <?php endforeach; ?>
					</div>
</div>

because i want to make 20 post/page (10 posts in left column and 10post in right column)

any help would be greatttttt!!!

thanks in advance