for(var d in response.data) {
    var item = response.data[d];
    console.log("test-1234=="+JSON.stringify(item));
}

test-1234=={"id":3,"isLeaf":"false","name":"bang","pid":0,"didabled":null}
test-1234=={"id":4,"isLeaf":"true","name":"test1","pid":3,"didabled":null}
test-1234=={"id":5,"isLeaf":"true","name":"test2","pid":3,"didabled":null}
test-1234=={"id":6,"isLeaf":"false","name":"test3","pid":0,"didabled":null}

[
{
    name: 'bang',
    id: 3,
    pid: 0,
    dragDisabled: true,
    children: [
        {
            name: 'test1',
            id: 4,
            isLeaf: true,
            pid: 3
        },
       {
            name: 'test2',
            id: 5,
            isLeaf: true,
            pid: 3
        }
    ]
},
 {
            name: 'test3',
            id: 6,
            isLeaf: true,
            pid: 0
        }
]