Как добавить свой первый пункт в хлебных крошках

$APPLICATION->AddBufferContent(
    Array(&$APPLICATION, "GetNavChain"),
    $path,
    $arParams["START_FROM"],
    $templatePath,
    $bIncludeOnce = true,
    $bShowIcons = false
);

public function GetNavChain($path=false, $iNumFrom=0, $sNavChainPath=false, $bIncludeOnce=false, $bShowIcons = true)
\bitrix\modules\main\classes\general\main.php 

$APPLICATION->AddBufferContent(
    //Array(&$APPLICATION, "GetNavChain"),
        "GetNavChain",
    $path,
    $arParams["START_FROM"],
    $templatePath,
    $bIncludeOnce = true,
    $bShowIcons = false
);

//так будет заменятся ключик...
$APPLICATION->SetPageProperty('custom_replace_chain', array("key"=>0, 'value'=>array('TITLE'=> 'NEWTITLE', 'LINK'=> '/new_link/')));

function GetNavChain($path = false, $iNumFrom = 0, $sNavChainPath = false, $bIncludeOnce = false, $bShowIcons = true)
{
    global $APPLICATION;

    if ($APPLICATION->GetProperty("NOT_SHOW_NAV_CHAIN") == "Y")
        return "";
    CMain::InitPathVars($site, $path);
    $DOC_ROOT = CSite::GetSiteDocRoot($site);
    if ($path === false)
        $path = $APPLICATION->GetCurDir();

    $arChain = array();
    $strChainTemplate = $DOC_ROOT . SITE_TEMPLATE_PATH . "/chain_template.php";
    if (!file_exists($strChainTemplate)) {
        if (($template = getLocalPath("templates/.default/chain_template.php", BX_PERSONAL_ROOT)) !== false) {
            $strChainTemplate = $DOC_ROOT . $template;
        }
    }

    $io = CBXVirtualIo::GetInstance();

    while (true) {//until the root
        $path = rtrim($path, "/");

        $chain_file_name = $DOC_ROOT . $path . "/.section.php";
        if ($io->FileExists($chain_file_name)) {
            $sChainTemplate = "";
            $sSectionName = "";
            include($io->GetPhysicalName($chain_file_name));
            if (strlen($sSectionName) > 0)
                $arChain[] = array("TITLE" => $sSectionName, "LINK" => $path . "/");
            if (strlen($sChainTemplate) > 0) {
                $strChainTemplate = $sChainTemplate;
            }
        }

        if ($path . '/' == SITE_DIR)
            break;

        if (strlen($path) <= 0)
            break;

        //file or folder
        $pos = bxstrrpos($path, "/");
        if ($pos === false)
            break;

        //parent folder
        $path = substr($path, 0, $pos + 1);
    }

    if ($sNavChainPath !== false)
        $strChainTemplate = $DOC_ROOT . $sNavChainPath;

    $arChain = array_reverse($arChain);
    $arChain = array_merge($arChain, $APPLICATION->arAdditionalChain);
    if ($iNumFrom > 0)
        $arChain = array_slice($arChain, $iNumFrom);
    
    if(($custom = $APPLICATION->GetPageProperty('custom_replace_chain')) &&
            isset($custom['key'])) {
    // замена ключика.
        $arChain["{$custom['key']}"] = $custom['value'];
    }
    return $APPLICATION->_mkchain($arChain, $strChainTemplate, $bIncludeOnce, $bShowIcons);
}