<?php
$postcount = 1;
if (have_posts()) : while (have_posts()) : the_post();

if ($postcount==1) {
// ilk post
?>
<h2><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></h2>
<?php the_content(); ?>
<?php
} else {
// sonraki postlar
?>
<h2><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></h2>
<?php the_content(); ?>
<?php
$postcount++;
endwhile;
?>
<?php else : ?>
<h2>Not Found</h2>
<?php endif; ?>