multi columns with fpdf

Hi

been trying to figure the code below out it uses fpdf from here http://www.fpdf.org/
to convert a php page to pdf


at the minute it gets the results from the database and puts it into two columns like this below

info 1            info 7
info 2            info 8
info 3            info 9
info 4            info 10
info 5            info 11
info 6            info 12
                      info 13
                      info 14
                      info 15

how would i get it to go into a third column when it gets another 6 results

$pdf->SetXY(100,150);
$y_axis = 200;
$y2_axis = 0;
 
$sql = "select listingsdbelements_field_value from default_en_listingsdbelements where listingsdbelements_field_name = 'home_features' and listingsdb_id = '$listingID' limit 1"; 
$res = mysql_query($sql, $connection) or die(mysql_error());
 
//initialize counter
$i = 0;
 
while ($row = mysql_fetch_array($res)) {
$feature_index_list = explode("||", $row[0]);
sort($feature_index_list);
foreach($feature_index_list as $feature_list_item)
 
// prints 6 results then goes to the next cell
if ($i < 6) {
	$pdf->SetY($y_axis);
	$pdf->SetX(90);
 
	$pdf->Cell(20,4,$feature_list_item,0,1,L,'');
 
	//Go to next row
 
	$y_axis = $y_axis + 3;
	$i = $i+1;
	}
 
 
	else {
	$inity_axis = 200;
	$pdf->SetY($inity_axis+$y2_axis);
	$pdf->SetX(135);
 
 
 
	$pdf->Cell(20,4,$feature_list_item,0,1,L,'');
	$y2_axis = $y2_axis + 3;
 
	$i = $i+1;
 
 
 
	}
 
}

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