try to ask here:https://bitcointalk.org/index.php?topic=1094930.2680 this is main thread of faucetbox and OP is active, so, hope you will get correct answer and OP will solve your problem.
good luck
In the .php file where you want the rewards to display, just use this code:
<?=str_replace(" ,", ",", preg_replace("/\([^)]+\)/","",$data["rewards"]));?>