WPSE 121733

add_action('init', 'cptui_register_my_taxes_work_type');

function cptui_register_my_taxes_work_type() {
    register_taxonomy('work-type', array (0 => 'work'),
        array(
            'hierarchical' => true,
            'label' => 'Categories',
            'labels' => array (
              'search_items' => 'Category',
              'popular_items' => '',
              'all_items' => '',
              'parent_item' => '',
              'parent_item_colon' => '',
              'edit_item' => '',
              'update_item' => '',
              'add_new_item' => '',
              'new_item_name' => '',
              'separate_items_with_commas' => '',
              'add_or_remove_items' => '',
              'choose_from_most_used' => ''
            ),
            'rewrite' => array('with_front' => false)
        )
    );
}