public function index()
{
$els = new PHPExcel();
$filename = FCPATH . 'xls/aaa.xls';
$obj = new \PHPExcel_Reader_Excel5();
$nn = $obj->load($filename);
$htmlobj = new \PHPExcel_Writer_HTML($nn);
$htmlobj->save(FCPATH . 'xls/bbb.html');
}