Yes, it is possible, and it is done by creating the custom taxonomy, then creating the rewrite in the custom post type, and then adding a filter for post_type_link
to edit the actual permalink. Once you have the code in place, you have to go Settings > Permalinks and hit submit to refresh everything.
add_action( 'init', 'register_custax_type', 0 );
function register_custax_type() {
// Add new hierarchical taxonomy
$labels = array(
'name' => _x( 'Types', 'taxonomy general name' ),
'singular_name' => _x( 'Type', 'taxonomy singular name' ),
'search_items' => __( 'Search Types' ),
'all_items' => __( 'All Types' ),
'parent_item' => __( 'Parent Type' ),
'parent_item_colon' => __( 'Parent Type:' ),
'edit_item' => __( 'Edit Type' ),
'update_item' => __( 'Update Type' ),
'add_new_item' => __( 'Add New Type' ),
'new_item_name' => __( 'New Type Name' ),
'menu_name' => __( 'Type' ),
);
$args = array(
'hierarchical' => true,
'labels' => $labels,
'show_ui' => true,
'public' => true,
'show_admin_column' => true,
'query_var' => true,
'rewrite' => array( 'slug' => 'portfolio' )
);
register_taxonomy( 'type', array( 'portfolio' ), $args );
}
add_action( 'init', 'register_cpt_portfolio' );
function register_cpt_portfolio() {
$labels = array(
'name' => _x( 'Portfolios', 'portfolio' ),
'singular_name' => _x( 'Portfolio', 'portfolio' ),
'add_new' => _x( 'Add New', 'portfolio' ),
'add_new_item' => _x( 'Add New Portfolio', 'portfolio' ),
'edit_item' => _x( 'Edit Portfolio', 'portfolio' ),
'new_item' => _x( 'New Portfolio', 'portfolio' ),
'view_item' => _x( 'View Portfolio', 'portfolio' ),
'search_items' => _x( 'Search Portfolios', 'portfolio' ),
'not_found' => _x( 'No Portfolios found', 'portfolio' ),
'not_found_in_trash' => _x( 'No Portfolios found in Trash', 'portfolio' ),
'parent_item_colon' => _x( 'Parent Portfolio:', 'portfolio' ),
'menu_name' => _x( 'Portfolios', 'portfolio' ),
);
$args = array(
'labels' => $labels,
'hierarchical' => false,
'description' => 'Portfolios',
'supports' => array( 'title', 'revisions', 'editor', 'thumbnail' ),
'public' => true,
'show_ui' => true,
'show_in_menu' => true,
'menu_position' => 25,
'menu_icon' => 'dashicons-images-alt',
'show_in_nav_menus' => true,
'publicly_queryable' => true,
'exclude_from_search' => true,
'has_archive' => false,
'query_var' => true,
'can_export' => true,
'capability_type' => 'page',
'taxonomies' => array( 'type' ),
'rewrite' => array(
'slug' => 'portfolio/%type%',
'with_front' => false
)
);
register_post_type( 'portfolio', $args );
}
add_filter( 'post_type_link', 'portfolio_permastruct', 10, 2 );
function portfolio_permastruct( $link, $post ) {
// Only update portfolio permalinks
if( $post->post_type !== 'portfolio')
return $link;
// get terms, if none are returned, it's false and just returns
if( $cats = get_the_terms( $post->ID, 'type' ) )
$link = str_replace( '%type%', array_pop( $cats )->slug, $link );
return $link;
}
A full walk through can be found here