hopla, i have just wrote nonsense
i thougt you pass it throug a form, but anyway try this code
$url= "<a href=\"cat_display.php?";
for($x=0;$x<count($prod_des);$x++)
{
$url .= "prod_des[$x]=$prod_des[$x]&";
}
$url .= "\">cat_display.php</a>";
than in cat_display.php you have an array name $prod_des
try to
foreach($prod_des as $value)
echo $value;