Well, from what I understand
data1
is a comma separated list of values.
So you have to
split[
^] it on the comma (you'll end up with an array) and add the options to the list.
function (data1) {
var items = data1.split(',');
var jSelect = $("#ShopID");
for (var i = 0, len = items.length; i < len; ++i) {
jSelect.append('<option>' + items[i] + '</option>');
}
}