Here are my two arrays.
This array is $assesment I have tried the code given below and got $cat_array.
foreach($assesment as $k => $v){
$k2 = explode("_",$k);
/* echo "cat : ".$cat = $k2[0] ."-". $v;
echo "<br>";
echo "Que : ".$que = $k2[1]."-". $v;
echo "<br>"; */
$cat_array[] = $k2[0]."-".$v;
}
print_r($cat_array);