CAllCrmInvoice::GetFieldCaption

static function GetFieldCaption($fieldName)
{
	if($fieldName === 'CURRENCY_ID')
	{
		$fieldName = 'CURRENCY';
	}
	elseif($fieldName === 'LOCATION_ID')
	{
		$fieldName = 'PR_LOCATION';
	}

	$result = GetMessage("CRM_INVOICE_FIELD_{$fieldName}");
	return is_string($result) ? $result : '';
}