It works for me. add_filter(‘post_link’, ‘locale_permalink’, 10, 3); add_filter(‘post_type_link’, ‘locale_permalink’, 10, 3); function locale_permalink($permalink, $post_id, $leavename) { if (strpos($permalink, ‘%category_slider%’) === FALSE) return $permalink; $post = get_post($post_id); if (!$post) return $permalink; if ($post->post_type != ‘post’) { return $permalink; } else { $terms = wp_get_object_terms($post->ID, ‘category_slider’); if (!is_wp_error($terms) && !empty($terms) && is_object($terms[0])) $taxonomy_slug = $terms[0]->slug; else … Read more