function wz3_hidden_landing_noindex(){
  if (is_page('soldatengeschenke')) {
    echo "
<meta name="robots" content="noindex,nofollow">
";
  }
}
add_action('wp_head','wz3_hidden_landing_noindex',1);
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="http://werkzone3-shop.de/wp-sitemap.xsl" ?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><url><loc>http://werkzone3-shop.de/author/admin/</loc></url></urlset>