beauty_free, не поделишься?

$list = mysql_fetch_assoc(mysql_query('SELECT * FROM `pers` WHERE `id` = ' . intval($_GET['list']) . ' AND `type` = "list" LIMIT 1'));


$next_list = mysql_fetch_assoc(mysql_query('SELECT * FROM `pers` WHERE `type` = "list" AND `id` > ' . $list['id'] . ' ORDER BY `id` ASC LIMIT 1'));

$prev_list = mysql_fetch_assoc(mysql_query('SELECT * FROM `pers` WHERE `type` = "list" AND `id` < ' . $list['id'] . ' ORDER BY `id` DESC LIMIT 1'));

<a href="?pers&list=' . $prev_list['id'] . '">Назад</a>
<a href="?pers&list=' . $next_list['id'] . '">Далее</a>

С условиями сам разбирайся)