<?php $my_query = new WP_Query('category_name=featured&showposts=1');
while ($my_query->have_posts()) : $my_query->the_post();
$do_not_duplicate = $post->ID;?>
NELERİ KOYACAKSAN ARTIK ONLARI KOYUYORUZ
<?php endwhile; ?>
<!-- Do other stuff... -->
<?php if (have_posts()) : while (have_posts()) : the_post();
if( $post->ID == $do_not_duplicate ) continue; update_post_caches($posts); ?>
NELERİ KOYACAKSAN ARTIK ONLARI KOYUYORUZ
<?php endwhile; endif; ?>

<?php if (have_posts()) : $sayi=0; ?>
<?php while (have_posts()) : the_post(); $sayi++; ?>
<?php if ($sayi){ $class="genis";}else{ $class="dar";} ?>
<div class="<?php echo $class; ?>">
<h2><?php the_title(); ?></h2>
<?php the_content(); ?>
</div>
<?php endwhile; ?>
<?php endif; ?>