Can’t get tags to work

Hi All,
I’m using a modified version of the WordPress loop, which is why I assume I’m unable to get my tags to show up. The beginning of my looks like this:

<?php //if (have_posts()) : while (have_posts()) : the_post(); ?>
		<?php
			if ($posts)
			{
			function stupid_hack($str)
			{
			return preg_replace('|</ul>\s*<ul class="linklog">|', '', $str);
			}
			ob_start('stupid_hack');
			foreach($posts as $post)
			{
			start_wp();
			?>

Then I have a bunch of conditions to check what category a post is in and then to format it accordingly. Here’s a sample of one :

<?php if ( in_category(30) ) : ?>

			<div class="post twitter" id="post-<?php the_ID(); ?>">
				<h2><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?> <?php the_date('m.d.Y'); ?>:</a></h2>
				<div class="entry">
					<?php the_content('Read the rest of this entry &raquo;'); ?>
				</div>
			</div>

I tried adding <?php echo single_tag_title(); ?> in post meta data but it didn’t work. Any help would be most appreciated!