public function userCheck(){
        $result = json_encode($this->array_filter_recursive($legs), JSON_PRETTY_PRINT);
        $this->load->view('tree/drag-drop', array('builder'=>$result));
        }

        public function array_filter_recursive($arr, $cb = null) {
        if (empty($cb)) {
        $cb = function ($el) {
        return $el;
        };
        }
        $result = array();
        foreach($arr as $key => $val) {
        if (is_array($val)) $val = $this->array_filter_recursive($val, $cb);
        if ($cb($val)) $result[$key] = $val;
        }
        return $result;
        }

$(function() {
   var datascource = {
  'name': '<?= $account[0]->first_name.' '.$account[0]->last_name ?>',
  'title': '<?= $account[0]->gcn_id ?>',
  'children':<?= $builder?>
};

var oc = $('#chart-container').orgchart({
  'data' : datascource,
  'nodeContent': 'title',
  'draggable': true,
  'dropCriteria': function($draggedNode, $dragZone, $dropZone) {
    if($draggedNode.find('.content').text().indexOf('manager') > -1 && $dropZone.find('.content').text().indexOf('engineer') > -1) {
      return false;
    }
    return true;
  }
});

oc.$chart.on('nodedropped.orgchart', function(event) {
  console.log('draggedNode:' + event.draggedNode.children('.title').text()
    + ', dragZone:' + event.dragZone.children('.title').text()
    + ', dropZone:' + event.dropZone.children('.title').text()
  );
}); });