With this filter you can determine what should happen when registering the settings. This affects the WordPress function register_setting and replaces the arguments for this function that Helpful uses. You can also re-enable the HTML this way, but then take the risk for a security vulnerability.

 * Disable sanitization for the field with the helpful_pro (the Pro button) to allow HTML.
 * @param array $args
 * @param string $field
 * @return array
add_filter('helpful_settings_group_args', function($args, $field) {

    if ('helpful_pro' === $field) {
        $args = [
            'sanitize_callback' => null,

    return $args;
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