$category["name"] = "Мимоза";
$category["id"] = 123456;
$arParamsTrans = array("replace_space"=>"-","replace_other"=>"-");

$arCatalogSectionFields = array(
                "ACTIVE" => 'Y',
                "IBLOCK_ID" => $bitrixCatalogBlockId,
                "NAME" => $category["name"],
                "XML_ID" => $category["id"],
                "IBLOCK_SECTION_ID" => $bitrixSectionId,
            );

$arCatalogSectionFields["CODE"] = $trans = Cutil::translit($category["name"],"ru",$arParamsTrans);

print_r($arCatalogSectionFields);