Wordpress Custom Taxonomy rewrite rules

//PUT THIS CODE INTO YOUR functions.php

//Creating custom taxonomy:

add_action( 'init', 'create__taxonomy' );

function create__taxonomy() {

/* ##########################################################
 * ### 'GALLERY' custom post type related custom taxonomy ###
 * ##########################################################
 */

    /*
     * Hi, we are 'Gallery Categories' - custom taxonomy of 'gallery' custom post type.
     */
    $labels = array(
        'name' => _x( 'Gallery - Categories', 'taxonomy general name', 'translation-domain' ),
        'singular_name' => _x( 'Gallery Category', 'taxonomy singular name', 'translation-domain' ),
        'search_items' =>  __( 'Search Categories', 'translation-domain' ),
        'all_items' => __( 'All Categories - Gallery', 'translation-domain' ),
        'parent_item' => __( 'Parent Category', 'translation-domain' ),
        'parent_item_colon' => __( 'Parent Category:', 'translation-domain' ),
        'edit_item' => __( 'Edit Category - Gallery', 'translation-domain' ),
        'menu_name' => __( 'Gallery Categories', 'translation-domain' ),
        'update_item' => __( 'Update Category - Gallery', 'translation-domain' ),
        'add_new_item' => __( 'Add New Gallery Category', 'translation-domain' ),
        'new_item_name' => __( 'New Gallery Category Name', 'translation-domain' ),
      );

    register_taxonomy('gallery_category','gallery',array(
        'hierarchical' => true,
        'labels' => $labels,
        //'query_var' => true,
        'query_var' => 'gallery_category',
        'rewrite' => false
                  ));

// Register custom rewrite rules
// @source: http://wpquestions.com/question/show/id/2841 (last comments)
    global $wp_rewrite;

    $wp_rewrite->add_rewrite_tag('%gallery%', '([^/]+)', 'gallery=');
    $wp_rewrite->add_rewrite_tag('%gallery_category%', '([^/]+)', 'gallery_category=');

    $wp_rewrite->add_permastruct('gallery_category', '/galeria/kategoria-%gallery_category%', false, EP_CATEGORIES);
    $wp_rewrite->add_permastruct('gallery', '/galeria/kategoria-%gallery_category%/%gallery%', false);

}


//Adding Rewrite rules:
// @source: http://wpquestions.com/question/show/id/2841 (last comments)

add_filter('post_type_link', 'wp_gallery_permalinks', 10, 3);
add_filter('term_link', 'wp_gallery_term_link', 10, 3);

function wp_gallery_permalinks($permalink, $post_id, $leavename) {

    $no_terms = 'no-category';
    $post = get_post($post_id);

    if($post->post_type != 'gallery' || empty($permalink) || in_array($post->post_status, array('draft', 'pending', 'auto-draft')))
        return $permalink;

    $terms = wp_get_object_terms((int)$post->ID, 'gallery_category');

    if(is_wp_error($terms) || empty($terms)) {

        $term_slug = $no_terms;

    } else {
        $term = reset($terms);

        if(is_object($term))
            $term_slug = $term->slug;
        else
            $term_slug = $no_terms;
    }

    $permalink = str_replace('%gallery_category%', $term_slug, $permalink);

    return $permalink;
}



function wp_gallery_term_link($termlink, $term, $taxonomy) {
    $termlink = str_replace('%gallery_category%', $term->slug, $termlink);
    return $termlink;
}