我已经创建了新的帖子类型“groceries”，创建了“fruit”分类法，并添加了一堆类别，但当我过滤这个类别时，url显示如下.localhost/fruit/apple 我想展示一下.localhost/groceries/fruit/apple 如何做到这一点我正在使用此基本过滤器：

<li id="categories_topics">
    <?php
    $args = array(
      \'show_option_none\' => \'Select category\',
      \'taxonomy\'         => \'fruit\',
      \'field\'            => \'slug\',
      \'id\'               => \'cat\',
    );
    ?>

  <?php wp_dropdown_categories( $args ); ?>
  <script type="text/javascript">
    <!--
    var dropdown = document.getElementById("cat");
    function onCatChange() {
      if ( dropdown.options[dropdown.selectedIndex].value > 0 ) {
        var str = $( "#cat option:selected" ).text();
        str = str.replace(/\\s+/g, \'-\').toLowerCase();
        location.href = "<?php echo esc_url( home_url( \'/\' ) ); ?>?fruit="+str
      }
    }
    dropdown.onchange = onCatChange;
    -->
  </script>
</li>