register_taxonomy.php

<?php

function km_register_taxonomy_include_staff_on_page() {
    $labels = array(
        'name' => __( 'Include on Page', 'hmc' ),
        'singular_name' => __( 'Include on Page', 'hmc' ),
        'search_items' => __( 'Search Include on Page', 'hmc' ),
        'popular_items' => __( 'Popular Include on Page', 'hmc' ),
        'all_items' => __( 'All Include on Page', 'hmc' ),
        'parent_item' => __( 'Parent Include on Page', 'hmc' ),
        'parent_item_colon' => __( 'Parent Include on Page:', 'hmc' ),
        'edit_item' => __( 'Edit Include on Page', 'hmc' ),
        'update_item' => __( 'Update Include on Page', 'hmc' ),
        'add_new_item' => __( 'Add New Include on Page', 'hmc' ),
        'new_item_name' => __( 'New Include on Page', 'hmc' ),
        'separate_items_with_commas' => __( 'Separate Include on Page with commas', 'hmc' ),
        'add_or_remove_items' => __( 'Add or remove Include on Page', 'hmc' ),
        'choose_from_most_used' => __( 'Choose from the most used Include on Page', 'hmc' ),
        'menu_name' => __( 'Include on Page', 'hmc' ),
    );

    $args = array(
        'labels' => $labels,
        'public' => false, // set to false so your tax terms aren't shown on the front end of your site
        'show_in_nav_menus' => false,
        'show_ui' => true, // set to true so these taxonomy terms appear on post edit screen
        'show_tagcloud' => false,
        'show_admin_column' => false,
        'hierarchical' => false,
        'rewrite' => false,
        'query_var' => true
    );
    register_taxonomy( 'include_staff_on_page', array( 'staff' ), $args );
}
add_action( 'init', 'km_register_taxonomy_include_staff_on_page' ) );