Use a string to store your option, and then append it to the select tag. Then, please check that data is there in the val.

$.getJSON("get-data.php?dat=driver",function(data){
    var stringToAppend = "";
    $.each(data,function(key,val) {

       stringToAppend += "" + val.id + "";

    });

    $("#night_Shift_text").html(stringToAppend);
});