http://codex.wordpress.org/The_Loop
Intente todo, sin embargo me dice que no existe la categoria y el llop no se detiene imprimiendo el mensaje n cantidad de veces.
Código PHP:
<!-- Start the Loop. -->
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
<!-- The following tests if the current post is in category 3. -->
<!-- If it is, the div box is given the CSS class "post-cat-three". -->
<!-- Otherwise, the div box will be given the CSS class "post". -->
<?php if ( in_category('3') ) { ?>
<div class="post-cat-three">
<?php } else { ?>
<div class="post">
<?php } ?>
<!-- Display the Title as a link to the Post's permalink. -->
<h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
<!-- Display the Time. -->
<small><?php the_time('F jS, Y'); ?></small>
<!-- Display the Post's Content in a div box. -->
<div class="entry">
<?php the_content(); ?>
</div>
<!-- Display a comma separated list of the Post's Categories. -->
<p class="postmetadata">Posted in <?php the_category(', '); ?></p>
</div> <!-- closes the first div box -->
<!-- Stop The Loop (but note the "else:" - see next line). -->
<?php endwhile; else: ?>
<!-- The very first "if" tested to see if there were any Posts to -->
<!-- display. This "else" part tells what do if there weren't any. -->
<p>Sorry, no posts matched your criteria.</p>
<!-- REALLY stop The Loop. -->
<?php endif; ?> 
