title: How to only display thumbnail for first post of Category
body: <p>I have this code to show all post of category and thumbnail of them.</p>
  
  <hr>
  
  <pre><code>&lt;?php $recent = new WP_Query(); ?&gt;
  &lt;?php $recent-&gt;query('cat=1&amp;showposts=5'); ?&gt;
  &lt;?php while($recent-&gt;have_posts()) : $recent-&gt;the_post(); ?&gt;
  &lt;ul&gt;
      &lt;li&gt;
              &lt;a href="&lt;?php the_permalink(); ?&gt;"&gt;
              &lt;?php the_title(); ?&gt;
              &lt;/a&gt;
         &lt;/li&gt;
  &lt;/ul&gt;
  &lt;?php endwhile; ?&gt;
  </code></pre>
  
  <hr>
  
  <p>But now I only want show thumbnail for first post of category. 
  clearly,ex Category have 4 post, I show 4 post but only first post have thumbnail,3 posts remain only have title and permalink</p>