product_category_taxonomy

ptoduct_cat_taxonomy.php

<?php
/*Plugin Name: Create product Category Taxonomy
Description: This plugin registers the 'product category' taxonomy and applies it to the 'product' post type.
Version: 1.0
License: GPLv2
*/ 

function product_register_taxonomy() {
		// set up labels
	$labels = array(
		'name' => 'Product Categories',
		'singular_name' => 'Product Category',
		'search_items' => 'Search Product Categories',
		'all_items' => 'All Product Categories',
		'edit_item' => 'Edit Product Category',
		'update_item' => 'Update Product Category',
		'add_new_item' => 'Add New Product Category',
		'new_item_name' => 'New Product Category',
		'menu_name' => 'Product Categories'
		);
// register taxonomy
	register_taxonomy( 'productcat', 'product', array(
		'hierarchical' => true,
		'labels' => $labels,
		'query_var' => true,
		'show_admin_column' => true
		) ); 
}
add_action( 'init', 'product_register_taxonomy' );