Need Help here

i have this php code i need to convert to codeigniter , some can help me im really new o this 


$pdf->SetFillColor(210,210,210); //linea gris
$pdf->SetTextColor(0,0,0); //texto negro
$header=array('GRADO','CEDULA','CARNET','NOMBRES Y APELLIDOS');
$pdf->SetWidths(array(30,40,30,80));
$pdf->SetAligns(array('C','C','C','L')); //para las celdas de la tabla

//imprimir encabezado
for($l=0;$l<count($header);$l++)
$pdf->Cell($pdf->widths[$l],5,$header[$l],1,0,'C',true);
$pdf->Ln();


thx for the help