component_epilog.php

<?php

if(!empty($arResult['PAGE_HEAD_EXTRA_CONTENT'])) {
    $APPLICATION->SetPageProperty('PAGE_HEAD_EXTRA_CONTENT', $arResult['PAGE_HEAD_EXTRA_CONTENT']);
    $APPLICATION->SetPageProperty('PAGE_HEAD_EXTRA_CLASS', '_bigger');
    $APPLICATION->SetPageProperty('NOT_SHOW_NAV_CHAIN', 'Y');
}