Регистрация пользователей. Меняем порядок полей через result_modifier.php

<?if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true);

// Function for order
function sortArray($arSource, $arOrder, $arUserFields = Array()) {
   $arFirst      = Array();
   $arUserProps   = Array();
   if(count($arUserFields)) {
      foreach($arUserFields as $keyFiels=>$arField) {
         $arUserProps[] = $keyFiels;
      }
   }
   $arUsedFields = array_merge($arSource, $arUserProps);

   foreach($arOrder as $sField) {
      if(in_array($sField, $arUsedFields)) {
         $arFirst[] = $sField;

         foreach($arUsedFields as $keySource=>$sSource) {
            if($sSource == $sField) {
               unset($arUsedFields[$keySource]);
            }
         }
      }
   }

   $arResult = array_merge($arFirst, $arUsedFields);

   return $arResult;
}

// Set array of order fields
$arOrder = Array(
   "NAME",
   "PERSONAL_PHONE",
   "EMAIL",
   "UF_PERSON",
   "PASSWORD",
   "CONFIRM_PASSWORD"
);

// Order of array
$arResult["SHOW_FIELDS"] = sortArray($arResult["SHOW_FIELDS"], $arOrder, $arResult["USER_PROPERTIES"]["DATA"]);

... 
<?if(GetMessage("REGISTER_FIELD_".$FIELD)):?>
   <tr>
      <td><?=GetMessage("REGISTER_FIELD_".$FIELD)?>:<?if ($arResult["REQUIRED_FIELDS_FLAGS"][$FIELD] == "Y"):?><span class="starrequired">*</span><?endif?></td>
    </tr>
<?endif;?> 
...  
default:
   if(strstr($FIELD, "UF_")) {
      $arUserField = $arResult["USER_PROPERTIES"]["DATA"][$FIELD];
      ?>
         <tr>
            <td>
               <?=$arUserField["EDIT_FORM_LABEL"]?>:<?if ($arUserField["MANDATORY"]=="Y"):?><span class="starrequired">*</span><?endif;?>
            </td>
         </tr>
         <tr>
            <td>
               <?$APPLICATION->IncludeComponent(
                  "bitrix:system.field.edit",
                  $arUserField["USER_TYPE"]["USER_TYPE_ID"],
                  array("bVarsFromForm"=>$arResult["bVarsFromForm"],"arUserField"=>$arUserField,"form_name"=>"regform"), null, array("HIDE_ICONS"=>"Y"));?>
            </td>
         </tr>
      <?
      } else {
         if ($FIELD == "PERSONAL_BIRTHDAY") 
...  
<?if($arResult["USER_PROPERTIES"]["SHOW"] == "Y" && false):?>