Tips on Customizing Zilla Portfolio

How to Hide Zilla Portfolio Admin Menus

function plt_hide_zillaportfolio_menus() {
	//Hide "Portfolio Posts".
	remove_menu_page('edit.php?post_type=portfolio');
	//Hide "Portfolio Posts → Portfolio Posts".
	remove_submenu_page('edit.php?post_type=portfolio', 'edit.php?post_type=portfolio');
	//Hide "Portfolio Posts → Add New Portfolio Post".
	remove_submenu_page('edit.php?post_type=portfolio', 'post-new.php?post_type=portfolio');
	//Hide "Portfolio Posts → Portfolio Types".
	remove_submenu_page('edit.php?post_type=portfolio', 'edit-tags.php?taxonomy=portfolio-type&post_type=portfolio');
}

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

Where do I put this code?

How to Hide Zilla Portfolio Meta Boxes

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

	//Hide the "Zilla Portfolio Settings" meta box.
	remove_meta_box('tzp-portfolio-metabox-settings', $screen->id, 'normal');
	//Hide the "Zilla Portfolio Gallery" meta box.
	remove_meta_box('tzp-portfolio-metabox-gallery', $screen->id, 'normal');
	//Hide the "Zilla Portfolio Audio" meta box.
	remove_meta_box('tzp-portfolio-metabox-audio', $screen->id, 'normal');
	//Hide the "Zilla Portfolio Video" meta box.
	remove_meta_box('tzp-portfolio-metabox-video', $screen->id, 'normal');
}

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