Tips on Customizing WP Hotelier

How to Hide WP Hotelier Admin Menus

function plt_hide_wp_hotelier_menus() {
	//Hide "Hotelier".
	remove_menu_page('hotelier-settings');
	//Hide "Hotelier → Settings".
	remove_submenu_page('hotelier-settings', 'hotelier-settings');
	//Hide "Hotelier → Add Reservation".
	remove_submenu_page('hotelier-settings', 'hotelier-add-reservation');
	//Hide "Hotelier → Reservations".
	remove_submenu_page('hotelier-settings', 'edit.php?post_type=room_reservation');
	//Hide "Hotelier → Extras".
	remove_submenu_page('hotelier-settings', 'edit.php?post_type=extra');
	//Hide "Hotelier → Calendar".
	remove_submenu_page('hotelier-settings', 'hotelier-calendar');
	//Hide "Hotelier → Logs".
	remove_submenu_page('hotelier-settings', 'hotelier-logs');

	//Hide "Rooms".
	remove_menu_page('edit.php?post_type=room');
	//Hide "Rooms → All Rooms".
	remove_submenu_page('edit.php?post_type=room', 'edit.php?post_type=room');
	//Hide "Rooms → Add New Room".
	remove_submenu_page('edit.php?post_type=room', 'post-new.php?post_type=room');
	//Hide "Rooms → Categories".
	remove_submenu_page('edit.php?post_type=room', 'edit-tags.php?taxonomy=room_cat&post_type=room');
	//Hide "Rooms → Rates".
	remove_submenu_page('edit.php?post_type=room', 'edit-tags.php?taxonomy=room_rate&post_type=room');
	//Hide "Rooms → Facilities".
	remove_submenu_page('edit.php?post_type=room', 'edit-tags.php?taxonomy=room_facilities&post_type=room');
}

add_action('admin_menu', 'plt_hide_wp_hotelier_menus', 51);

Where do I put this code?

How to Hide WP Hotelier Meta Boxes

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

	//Hide the "Room Gallery" meta box.
	remove_meta_box('hotelier-room-images', $screen->id, 'side');
	//Hide the "Room Settings" meta box.
	remove_meta_box('hotelier-room-settings', $screen->id, 'normal');
	//Hide the "Room Short Description" meta box.
	remove_meta_box('postexcerpt', $screen->id, 'normal');
	//Hide the "Save Reservation" meta box.
	remove_meta_box('hotelier-reservation-save', $screen->id, 'side');
	//Hide the "Reservation Notes" meta box.
	remove_meta_box('hotelier-reservation-notes', $screen->id, 'side');
	//Hide the "Reservation Details" meta box.
	remove_meta_box('hotelier-reservation-data', $screen->id, 'normal');
	//Hide the "Rooms" meta box.
	remove_meta_box('hotelier-reservation-items', $screen->id, 'normal');
	//Hide the "Coupon Settings" meta box.
	remove_meta_box('hotelier-coupon-settings', $screen->id, 'normal');
	//Hide the "Extra Settings" meta box.
	remove_meta_box('hotelier-extra-settings', $screen->id, 'normal');
}

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