Codeigniter强制下载CSV防止自动格式删除前导零

I have an issue with the CSV file when I download it using CodeIgniter default force download function then the item number that starts from the zero is missed how I get this on the excel file. please tell me if you know how to show leading zero in CSV. please see the screenshot all items start from zero but excel not show

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here is my code in the $rows[ ] all the data that i want to export in the excel.

$content = array_to_spreadsheet($rows);

        $this->user_log->add_employee_activity(lang('activity_items_export') ,lang('activity_item'), lang('yes'));
        force_download('items_export.' . ($this->config->item('spreadsheet_format') == 'XLSX' ? 'xlsx' : 'csv'), $content);
        exit;