SOURCE

var list = [
    { "WARNING_LABLE": "1:3", "WARNING_TYPE_CUST_NUMBER": "400" },
    { "WARNING_LABLE": "2:1", "WARNING_TYPE_CUST_NUMBER": "400" },
    { "WARNING_LABLE": "2:3", "WARNING_TYPE_CUST_NUMBER": "400" },
    { "WARNING_LABLE": "1:1", "WARNING_TYPE_CUST_NUMBER": "400" },
    { "WARNING_LABLE": "1:2", "WARNING_TYPE_CUST_NUMBER": "400" },
    { "WARNING_LABLE": "3:2", "WARNING_TYPE_CUST_NUMBER": "400" }
]

console.log(generateNewData(list))

function generateNewData(list) {
    var one = [];
    var two = [];
    var three = [];
    list.forEach(function (item, index, self) {
        var warnType = item.WARNING_LABLE.substring(0, 1)
        if (warnType == 1) {
            one.push(item);
        } else if (warnType == 2) {
            two.push(item);
        } else if (warnType == 3) {
            three.push(item);
        }
    })
    one.sort(function (a, b) { return a.WARNING_LABLE.substring(2) - b.WARNING_LABLE.substring(2) })
    two.sort(function (a, b) { return a.WARNING_LABLE.substring(2) - b.WARNING_LABLE.substring(2) })
    three.sort(function (a, b) { return a.WARNING_LABLE.substring(2) - b.WARNING_LABLE.substring(2) })
    return [one, two, three]
}