Register Portfolio post type and a related taxonomy called Groups

cpt-taxonomy.php

<?php
/**
 * This file contains code related to Custom Post Types & Taxonomies

/**
  * Create portfolio custom post type
  *
  */
function create_post_types() {

  // If Portfolio post type is already registered, bail
	if ( post_type_exists( 'portfolio' ) )
		$return;

	register_post_type( 'portfolio',
		array(
			'labels' => array(
				'name'          => __( 'Portfolio', 'minimum' ),
				'singular_name' => __( 'Portfolio', 'minimum' ),
			),
			'exclude_from_search' => true,
			'has_archive'         => true,
			'hierarchical'        => true,
			'menu_icon'           => get_stylesheet_directory_uri() . '/images/icons/portfolio.png',
			'public'              => true,
			'rewrite'             => array( 'slug' => 'portfolio' ),
			'supports'            => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'trackbacks', 'custom-fields', 'comments', 'revisions', 'page-attributes', 'genesis-seo' ),
		)
	);
	
}
add_action( 'init', 'create_post_types' );



/**
  * Post Type Support for the Genesis Simple Sidebars plugin
  *
  */
//add_post_type_support( 'portfolio', 'genesis-simple-sidebars' );

/**
  * Create taxonomy `Group` for the `Portfolio` post type
  *
  */
function create_taxonomies() {

	register_taxonomy( 'group', 'portfolio', array (
	
		'public' 			=> true,
		'hierarchical'		=> true,
		'show_ui' 			=> true,
		'show_in_nav_menus' => true,
		'query_var' 		=> true,
		'labels' 			=> array(
			'name' 			=> _x( 'Groups', 'taxonomy general name' ),
			'singular_name' => _x( 'Group', 'taxonomy singular name' ),
			'search_items' 	=>  __( 'Search Groups' ),
			'all_items' 	=> __( 'All Groups' ),
			'parent_item' 	=> __( 'Parent Group' ),
			'edit_item' 	=> __( 'Edit Group' ),
			'update_item' 	=> __( 'Update Group' ),
			'add_new_item' 	=> __( 'Add New Group' ),
			'new_item_name' => __( 'New Group Name' ),
			'menu_name' 	=> __( 'Groups' ),
		),

		// Control the slugs used for this taxonomy
		'rewrite' => array (
			'slug' 			=> 'group', // This controls the base slug that will display before each term
			'with_front' 	=> true, // Display the category base before "/group/"
			'hierarchical' 	=> true // This will allow URL's like "/group/early-works/painting-name/"
		),
	));

}	
add_action( 'init', 'create_taxonomies' );