add_action('init', 'tdd_add_rewrite_rules');
  function tdd_add_rewrite_rules(){
    global $wp_rewrite;
    $wp_rewrite->add_rewrite_tag('%brand_name%', '([^/]+)', 'brand_name=');
    $wp_rewrite->add_permastruct('gallery', '/brands/%brand_name%/gallery/%gallery%', false);
  }

  add_filter('post_type_link', 'tdd_permalinks', 10, 3);
  function tdd_permalinks($permalink, $post, $leavename){
    $no_data = get_the_author_meta('ID');;
    $post_id = $post->ID;
    if($post->post_type != 'gallery' || empty($permalink) || in_array($post->post_status, array('draft', 'pending', 'auto-draft'))) return $permalink;
    $var1 = get_the_author_meta('brand_name');

  $var1 = sanitize_title($var1);
  if(!$var1) { $var1 = $no_data; }

  $permalink = str_replace('%brand_name%', $var1, $permalink);
  return $permalink;
  }