<?php
$categories = get_the_category($post->ID);
if ($categories) {
	$category_ids = array();
	foreach($categories as $individual_category) $category_ids[] = $individual_category->term_id;
	$args=array(
		'category__in' => $category_ids,
		'post__not_in' => array($post->ID),
		'showposts'=>5,
		'caller_get_posts'=>1
	);
        $my_query = new wp_query($args);
	if( $my_query->have_posts() ) {
		echo '<h3>Alternatifler</h3><ul>';
		while ($my_query->have_posts()) {
			$my_query->the_post();
		?>
			<li><a href="<?php the_permalink() ?>" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a></li>
		<?php
		}
		echo '</ul>';
	}
wp_reset_query();
}
?>