<div class="searchform clearfix">
                <form action="<?php bloginfo( 'siteurl' ); ?>/ket-qua-tim-kiem" method = "GET">
                <ul>
                    <li>

                        <label class="lbl">Từ khoá :</label>
                        <input type="text" placeholder="Nhập từ khóa" name = "keyword" value = "" required/>
                    </li>

                    <li>
                        <label class="lbl">Chuyên mục :</label>
                        <select name="chuyen-muc-2" id="chuyen-muc-bai-viet">
                            <option value="">Chọn chuyên mục</option>
                            <?php $args = array(
                                'hide_empty' => 0,
                                'taxonomy' => 'danh-muc-linh-vuc-hoat-dong',
                                'orderby' => id,
                            );
                            $cates = get_categories( $args );
                            foreach ( $cates as $cate ) {  ?>
                                <option value="<?php echo $cate->slug; ?>"><?php echo $cate->name; ?></option>
                            <?php } ?>
                        </select>
                    </li>
                    <li>
                        <label class="lbl">Tìm theo :</label>
                        <select name="tim-theo" id="tim-theo-bai-viet">
                            <option value="1">Tìm tiêu đề</option>
                            <option value="2">Tìm tiêu đề + nội dung</option>
                        </select>
                    </li>
                    <li>
                        <button type = "submit">Tìm kiếm bài viết</button>
                    </li>
                </ul>
                </form>
            </div>