Андрей

if($postCount==1){
  <h1><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h1>
  <div class="first">
  the_content();
  </div>
}
else {
  <h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
  <div class="other">
  the_excerpt();
  </div>
}