add_filter('site-reviews/custom/value/company_url', function ($value) {
    $regex = '/(>.+<\/a>)/';
    // add rel="nofollow" to links
    $value = preg_replace($regex, ' rel="nofollow"$1', $value);
    // change all google links
    if (preg_match('/google\.com/', $value)) {
        $value = preg_replace($regex, '>Google</a>', $value);
    }
    return $value;
});