posts by Categories #code-1
<?php
$catPost = get_posts('cat=888&posts_per_page=-1000');
foreach ($catPost as $post) : setup_postdata($post); ?>
<a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>">
<?php the_post_thumbnail('name of your thumbnail'); ?>
</a>
<h4>
<a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>">
<?php the_title(); ?>
</a>
</h4>
<hr/ style="clear:both;">
<?php endforeach;?>