<?php

add_action( 'init', 'kaolti_register_taxonomy' );

function kaolti_register_taxonomy() {

    register_taxonomy( 'kaolti_hardware', array( 'post' ), array(
        'labels' => array(
            'name' => 'Hardware Types',
            // You can add more label types here, see docs
        ),
        'hierarchical' => true,
        'rewrite' => array(
            'slug' => 'hardware',
        ),
    ) );

}