$prev_post = get_adjacent_post(false, '', true);
$next_post = get_adjacent_post(false, '', false);
if(!empty($prev_post)) {
echo 'Önceki Konu';
}
if(!empty($next_post)) {
echo 'Sonraki Konu';
}
?>
https://stackoverflow.com/questions/11379549/how-to-get-next-previous-post-hrefs-and-titles-in-wordpress
