// init.php

$redirectHlblock = Bitrix\Highloadblock\HighloadBlockTable::getById(3)->fetch();
$redirectEntity = Bitrix\Highloadblock\HighloadBlockTable::compileEntity($redirectHlblock);
$redirectClass = $redirectEntity->getDataClass();

// Редиректы
$redirectData = $redirectClass::getList(
    array(
    "select" => array("*"),
    "filter" => array(
        'UF_SITE_ID'  => SITE_ID,
        'UF_URL_FROM' => $APPLICATION->GetCurPage(false),
        '>UF_ACTIVE'  => 0,
        )
    )
)->fetch();

if (isset($redirectData['UF_URL_TO']) && !empty($redirectData['UF_URL_TO'])) {
    $status = CUserFieldEnum::GetList(array(), array('ID' => $redirectData['UF_STATUS']))->fetch();
    LocalRedirect($redirectData['UF_URL_TO'], true, $status['VALUE']);
}

// Подмена URL
$replaceData = $redirectClass::getList(
    array(
    "select" => array("*"),
    "filter" => array(
        'UF_SITE_ID' => SITE_ID,
        'UF_URL_TO'  => $APPLICATION->GetCurPage(false),
        '>UF_ACTIVE' => 0,
        )
    )
)->fetch();
if ($replaceData) {
    $context  = Bitrix\Main\Application::getInstance()->getContext();
    $server   = $context->getServer();
    $arServer = $server->toArray();

    $_SERVER['REQUEST_URI'] = $replaceData['UF_URL_FROM'];
    $arServer['REQUEST_URI'] = $replaceData['UF_URL_FROM'];
    $server->set($arServer);
    $context->initialize(
        new Bitrix\Main\HttpRequest($server, array() , array() , array() , $_COOKIE),
        $context->getResponse(),
        $server
    );
    $APPLICATION->reinitPath();
    define('INCLUDE_CATALOG_INDEX', true);
}