Removing menus from users other than the administrator

If you want to exclude menu items by their labels:

function hide_menu_items( $items ) {
    $items_to_exclude = ['Menu Item 1', 'Menu Item 2'];
    if ( !current_user_can( 'manage_options' ) ) foreach ($items as $key => $item) if ( in_array( $item->title, $items_to_exclude ) ) unset( $items[$key] );
    return $items;
}
add_filter( 'wp_get_nav_menu_items', 'hide_menu_items', 20 );