實現思路：

1、ztree中節點是通過一個json的Array作為數據源、，所以直接操作json字符串，然后轉為json對象數組。

2、然后用新構成的json數組對象重新初始化ztree對象。

代碼如下:
<link rel="stylesheet" href="demo.css" type="text/css">
<link rel="stylesheet" href="zTreeStyle.css" type="text/css">
<script type="text/javascript" src="jquery-1.4.4.min.js"></script>
<script type="text/javascript" src="jquery.ztree.core-3.5(1).js"></script>
<script type="text/javascript">
        var zTreeObj1;
        var zTreeObj2;
        var leftDivStr = "[";
        var rightDivStr = "[";
        var setting = {
            edit: {
                enable: false,
                showRemoveBtn: false,
                showRenameBtn: false
            },
            data: {
                simpleData: {
                    enable: true
                }
            },
            callback: {
                //onClick : menuOnClick
            }
        };
        function menuOnClick(event, treeId, treeNode, clickFlag) {

        }
        //注冊toSource函數，解決ie不支持Array的toSource()方法的問題
        Array.prototype.toSource = function (){
             var str = "[";
             for(var i = 0 ;i<this.length;i++){
                 str+="{id:/""+this[i].id+
                         "/",pId:/""+this[i].pId