user-roles-taxonomies.php

function vehicle_details() {
 
	// Add new "Vehicle Details" taxonomy
 
	register_taxonomy('vehicle_details', 'vehicle', array(
 
		// Hierarchical taxonomy (like categories)
		'hierarchical' => true,
 
		'public'  => true,
 
		'capabilities' => array (
                'manage_terms' => 'manage_categories', //by default only admin
                'edit_terms' => 'manage_vehicles',
                'delete_terms' => 'manage_vehicles',
                'assign_terms' => 'edit_vehicles' 
                ),
 
		// This array of options controls the labels displayed in the WP Admin UI
		'labels' => array(
 
			'name' => _x( 'Vehicle Details', 'taxonomy general name' ),
			'singular_name' => _x( 'Vehicle Detail', 'taxonomy singular name' ),
			'search_items' =>  __( 'Search Vehicle Detail' ),
			'all_items' => __( 'All Vehicle Details' ),
			'parent_item' => __( 'Parent' ),
			'parent_item_colon' => __( 'Parent:' ),
			'edit_item' => __( 'Edit Vehicle Detail' ),
			'update_item' => __( 'Update Vehicle Detail' ),
			'add_new_item' => __( 'Add New Vehicle Detail' ),
			'new_item_name' => __( 'New Vehicle Detail Name' ),
			'menu_name' => __( 'Vehicle Details' ),
 
		),
 
		// Control the slugs used for this taxonomy
		'rewrite' => array(
 
			'slug' => 'vehicle-details', // This controls the base slug that will display before each term
 
			'with_front' => false, // Don't display the category base before "/vehicle-details/"
 
			'hierarchical' => true // This will allow URL's like "/color/blue/lightblue/"
 
		),
 
	));
 
}
 
add_action( 'init', 'vehicle_details', 0 );