【编辑时】好奇怪，三级分类 下拉里第二级分类不显示。

<div class="col-sm-12">

        <select class="js-select2 form-control select2-hidden-accessible" id="pid" name="pid" data-allow-clear="true" data-placeholder="请选择一项" tabindex="-1" aria-hidden="true">

            <option></option>

                        <option value="0">顶级分类</option>

                        <option value="1">彩票</option>

                        <option value="2" selected="">    ┝ 国内</option>

                        <option value="9">        ┝ 体育彩票</option>

                        <option value="10">        ┝ 高频彩种</option>

                        <option value="11">        ┝ 地方彩种</option>

                        <option value="12">        ┝ 竞技彩票</option>

                        <option value="3">    ┝ 港澳台</option>

                        <option value="4">    ┝ 国外</option>

                        <option value="5">第三方登录</option>

                        <option value="6">    ┝ 国内</option>

                        <option value="7">    ┝ 国外</option>

                    </select><span class="select2 select2-container select2-container--default select2-container--below select2-container--open" dir="ltr" style="width: 1023px;"><span class="selection"><span class="select2-selection select2-selection--single" role="combobox" aria-haspopup="true" aria-expanded="true" tabindex="0" aria-labelledby="select2-pid-container" aria-owns="select2-pid-results" aria-activedescendant="select2-pid-result-cj2r-1"><span class="select2-selection__rendered" id="select2-pid-container" title="    ┝ 国内"><span class="select2-selection__clear">×</span>    ┝ 国内</span><span class="select2-selection__arrow" role="presentation"><b role="presentation"></b></span></span></span><span class="dropdown-wrapper" aria-hidden="true"></span></span>

                <div class="help-block"><span class="text-danger">必选</span></div>

            </div>