Wordpress'te şunu nasıl yaparım ?

<div id="slider">
<ul id="sliderContent">

<?php
$glidecat = get_option('lux_gldcat');
$glidecount = get_option('lux_gldct');
$my_query = new WP_Query('category_name='. $glidecat .'&showposts= '. $glidecount . '');
while ($my_query->have_posts()) : $my_query->the_post();$do_not_duplicate = $post->ID;
?>
<li class="sliderImage">
<?php $preview = get_post_meta($post->ID, 'preview', $single = true); ?>
<a href="<?php the_permalink() ?>"><img src="<?php bloginfo('stylesheet_directory'); ?>/timthumb.php?src=<?php echo $preview; ?>&amp;h=250&amp;w=635&amp;zc=1" alt=""/> </a>
<span class="bottom">

<strong><a href="<?php the_permalink() ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a></strong>
<?php the_excerpt(); ?>


</span>
</li>
<?php endwhile; ?>

</ul>
</div>
<div class="clear"></div>