http://wpthemetutorial.com/2011/12/0...ts-navigation/

şunu bir inceleyin hocam işinize yarayabilir.

<?php

$nextPost = get_next_post();
$nextThumb = get_the_post_thumbnail($nextPost->ID, 'medium');
$nextTitle = $nextPost->post_title;
?>
<p class="next-link"><?php next_post_link('%link','<span>&lt;</span> '.$nextTitle); ?>