Tips on Customizing Portfolio Gallery With Filters / SILICONFOLIO

How to Hide SiliconFolio Admin Menus

function plt_hide_siliconfolio_menus() {
	//Hide "Portfolio".
	remove_menu_page('edit.php?post_type=portfolio');
	//Hide "Portfolio → Portfolio".
	remove_submenu_page('edit.php?post_type=portfolio', 'edit.php?post_type=portfolio');
	//Hide "Portfolio → Add New portfolio".
	remove_submenu_page('edit.php?post_type=portfolio', 'post-new.php?post_type=portfolio');
	//Hide "Portfolio → Categories".
	remove_submenu_page('edit.php?post_type=portfolio', 'edit-tags.php?taxonomy=portfolio-category&post_type=portfolio');
	//Hide "Portfolio → Portfolio Tags".
	remove_submenu_page('edit.php?post_type=portfolio', 'edit-tags.php?taxonomy=portfolio-tags&post_type=portfolio');
}

add_action('admin_menu', 'plt_hide_siliconfolio_menus', 15);

Where do I put this code?

How to Hide the "Additional settings" Meta Box

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

	//Hide the "Additional settings" meta box.
	remove_meta_box('extra_fields_plugin', $screen->id, 'normal');
}

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