jq-json数据-无限极-层级

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样子：

数据：
后台返回的json数据，

用法：务必页面加载执行，
 $.getJSON("get_all",function(res){
            var apend_id = 20;
            $("#treeMenu").append(showall(res,apend_id));
        })

 function showall(res,apend_id) {
        var str = "";
        var i_arr = [];
        for(var i in res){
            var div = '<div class=" navbar-right">' +
                        '<span style="margin-right: 10px"><i class="icon icon-arrow-up"  title="'+res[i].id+'"  onclick="orderZA(this)"></i>'+res[i].listorder+'</span>' +
                        '<span style="margin-right: 50px"><i class="icon icon-arrow-down"  title="'+res[i].id+'"  onclick="orderAZ(this)"></i>'+res[i].listorder+'</span> ' +
                        '<i onclick="addOpen(this)" title="'+res[i].id+'" class="icon icon-plus-sign-alt"></i>' +
                        '<i onclick="editForm(this)"  title="'+res[i].id+'"  class="icon icon-edit-sign"></i>' +
                        '<i  title="'+res[i].id+'" onclick="dele(this)"  class="icon icon-trash"></i>' +
                        '</div>';
            var urlstr = "";
            var children_s = res[i].children;
            if(children_s.length !=0){
                urlstr =  '<li class="has-list"> ' +
                        '<a  style="border:1px solid #f1f1f1; padding-left: '+apend_id+'px">' +res[i].name+div+'</a>' +
                        '<ul id="tree-menu-'+res[i].id+'"  style="margin: 0px; background: #fff;" >' +showall(children_s,apend_id+20)+
                        '</ul>' +
                        '</li>';
            }else {
                urlstr =  '<li class="has-list"> ' +
                        '<a   style="border:1px solid #f1f1f1; padding-left: '+apend_id+'px" >' +res[i].name+div+'</a>' +
                        '</li>';
            }

            str += urlstr;

        }
        return str;
    }