hi，朋友在这项服务我得到输出，但我想不同的输出让我解释

$customer_id = $_POST['customer_id'];
    $response = array();
    $qry="SELECT category FROM nesbaty_customer where c_id='".$customer_id."' ";
    $qry_res=mysqli_query($con,$qry);
    $jsonData = array();
    while ($array = mysqli_fetch_assoc($qry_res)) 
    {
        $r= $array['category'];

        $jsonData[]=explode(",",$r);

    }
    echo json_encode(array('data' =>$jsonData));
    mysqli_close($con);

我得到这样的输出

{
"data": [
    [
        "Hotel",
        "Saloon"
    ]
]

但我想要这样的输出！

{
"data": [
    [
       "category": "Hotel",
       "category": "Saloon"
    ]
]