``` ~~~ public function _initialize() { parent::_initialize(); $this->model = new \app\admin\model\Classification; $tree = Tree::instance(); $tree->init(collection($this->model->select())->toArray(), 'pid'); $this->categorylist = $tree->getTreeList($tree->getTreeArray(0), 'name'); $categorydata = [0 => ['type' => 'all', 'name' => __('None')]]; foreach ($this->categorylist as $k => $v) { $categorydata[$v['id']] = $v; } $this->view->assign("parentList", $categorydata); } ~~~ add ~~~ <div class="form-group"> <label for="c-pid" class="control-label col-xs-12 col-sm-2">{:__('父级')}:</label> <div class="col-xs-12 col-sm-8"> <select id="c-pid" data-rule="required" class="form-control selectpicker" name="row[pid]"> {foreach name="parentList" item="vo"} <option value="{$key}" {in name="key" value=""}selected{/in}>{$vo.name}</option> {/foreach} </select> </div> </div> ~~~ edit ~~~ <div class="form-group"> <label for="c-pid" class="control-label col-xs-12 col-sm-2">{:__('父级')}:</label> <div class="col-xs-12 col-sm-8"> <select id="c-pid" data-rule="required" class="form-control selectpicker" name="row[pid]"> {foreach name="parentList" item="vo"} <option class="" value="{$key}" {in name="key" value="$row.pid"}selected{/in}>{$vo.name}</option> {/foreach} </select> </div> </div> ~~~ ```