template.php

<?php
function customtheme_form($variables) {
  $element = $variables['element'];
  if (strpos($element['#id'], 'webform') == FALSE) {
    $element['#attributes'] = array('data-persist' => 'garlic');
  }
  if (isset($element['#action'])) {
    $element['#attributes']['action'] = drupal_strip_dangerous_protocols($element['#action']);
  }
  element_set_attributes($element, array('method', 'id'));
  if (empty($element['#attributes']['accept-charset'])) {
    $element['#attributes']['accept-charset'] = "UTF-8";
  }
  // Anonymous DIV to satisfy XHTML compliance.
  return '<form' . drupal_attributes($element['#attributes']) . '><div>' . $element['#children'] . '</div></form>';
}