taxonomies.php

<?php
add_action('init', 'portfolio_init');

/**
* Initialize simple-portfolio plugin
*/
function portfolio_init() {
	$custom_slug = get_option('slug') != '' ? get_option('slug') : 'portfolio';
	
	$args = array(
		'labels'			=> array(
			'name'					=> __('Portfolio'),
			'singular_name' 		=> __('Portfolio Project'),
			'add_new'				=> __('Add Project'),
			'add_new_item'			=> __('Add Project'),
			'new_item'				=> __('Add Project'),
			'view_item'				=> __('View Project'),
			'search_items' 			=> __('Search Portfolio'), 
			'edit_item' 			=> __('Edit Project'),
			'all_items'				=> __('Complete Portfolio'),
			'not_found'				=> __('No Projects found'),
			'not_found_in_trash'	=> __('No Projects found in Trash')
		),
		'taxonomies' => array( 'portfolio-tags', 'portfolio-categories'),
		'public'			=> true,
		'show_ui'			=> true,
		'_builtin'			=> false,
		'_edit_link'		=> 'post.php?post=%d',
		'capability_type'	=> 'post',
		'rewrite'			=> array('slug' => __($custom_slug)),
		'hierarchical'		=> true,
		'menu_position'		=> 20,
		'menu_icon'			=> WP_PLUGIN_URL . '/simple-portfolio/images/icon.jpg',
		'supports'			=> array('title', 'editor','comments')
	);
	

	register_taxonomy('portfolio-categories', 'portfolio-categories', array(
         'hierarchical'    => true,
         'show_ui'         => true,
         'label'           => __('Portfolio categories','portfolio-categories')
         )
    );

	register_taxonomy('portfolio-tags', 'portfolio-tags', array(
	     'hierarchical'    => false,
	     'show_ui'         => true,
	     'label'           => __('Portfolio tags','portfolio-tags')
	     )
	);
	
	/** create new custom post type */
	register_post_type('portfolio', $args);
}

?>