Tips on Customizing Category to Pages WUD

How to Hide Category to Pages WUD Admin Menus

function plt_hide_category_to_pages_wud_menus() {
	//Hide "Cat to Page WUD".
	remove_menu_page('category-to-pages-wud');
	//Hide "Cat to Page RSS".
	remove_menu_page('category-to-pages-rss-wud');

	//Hide "Pages → Categories".
	remove_submenu_page('edit.php?post_type=page', 'edit-tags.php?taxonomy=category&post_type=page');
	//Hide "Pages → Tags".
	remove_submenu_page('edit.php?post_type=page', 'edit-tags.php?taxonomy=post_tag&post_type=page');
}

add_action('admin_menu', 'plt_hide_category_to_pages_wud_menus', 11);

Where do I put this code?

How to Hide Category to Pages WUD Meta Boxes

function plt_hide_category_to_pages_wud_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Categories" meta box.
	remove_meta_box('categorydiv', $screen->id, 'side');
	//Hide the "Tags" meta box.
	remove_meta_box('tagsdiv-post_tag', $screen->id, 'side');
	//Hide the "Excerpt" meta box.
	remove_meta_box('postexcerpt', $screen->id, 'normal');
}

add_action('add_meta_boxes', 'plt_hide_category_to_pages_wud_metaboxes', 20);