PHP/CI ruining tabbing and ignoring new lines in document

[eluser]Developer13[/eluser]
$output = ('<option value="'.$i.'"'.$sel.'>'.$i.'</option>');

should be

$output = ('<option value="'.$i.'"'.$sel.'>'.$i."</option>\r\n");

Notice the double quotes and not single quotes wrapping the closing tag.