For extended conditional data, you can also have callback function, that will allow you to display based on row data. For e.g.

$col["on_data_display"] = array("display_keyword","");

function display_keyword($data)
{
$kw = $data["keyword_name"];
$numKeywords = count(explode("n",$pass));
if ($numKeywords > 3)
return $numKeywords." Keywords";
else
{
$pass = str_replace("+"," ",$pass);
return $pass;
}
}