好的，我找到了一个解决方案。如果这样做会给我带来麻烦，请告诉我。

基本上，我们以编程方式将类别添加到url链接。

在页面请求中，我们检查url是否以类别/子类别名称开头。如果是这样的话，我们只为这个请求预先准备permalink结构的%category%部分。

好东西是那个网站。com/%类别%/我的文章名称和网站。com/我的文章名称将指向相同的内容。该类别将在第一位，但通过一些调整，你可以把它放在你想要的地方。

设置无类别的permalinks结构（例如，/%年%/%月%/%postname%）将以下内容添加到functions.php

function add_categories( $permalink, $post, $leavename ) {
  if( $post->post_type != \'post\' ) return  $permalink;
  $cats = get_the_category($post->ID);
  if( ! count($cats) ) return $permalink;

  usort($cats, \'_usort_terms_by_ID\');
  $category_object = apply_filters( \'post_link_category\', $cats[0], $cats, $post );

  $category_object = get_term( $category_object, \'category\' );

  return _clear_uncategorized($category_object, $permalink);
}

function _clear_uncategorized($cat, $permalink) {
  if( $cat->slug != \'uncategorized\' ) {
    return \'/%category%\' . $permalink;
  }
  $parent = $cat->parent;
  if ( !$parent )
    return $permalink;
  return _clear_uncategorized($parent, $permalink);
}
add_filter( \'pre_post_link\', \'add_categories\', 9, 3 );

function custom_rewrite_basic() {
  global $wp_rewrite;
  $categories = get_the_categories();
  foreach ($categories as $cat) {
    if(strrpos($_SERVER["REQUEST_URI"], $cat) === 0 )
    {
        $wp_rewrite->permalink_structure = "/%category%" . $wp_rewrite->permalink_structure;
    }
  }
  $wp_rewrite->flush_rules();
}
add_action(\'init\', \'custom_rewrite_basic\');

function get_the_categories( $parent = 0, $pSlug = "" ) 
{
    $slug = array();
    $categories = get_categories( "hide_empty=0&parent=$parent" );
    if (!$categories) return $slug;
    foreach ( $categories as $cat )
    {
        $slug[] = (($pSlug)?"/".$pSlug : "")."/".$cat->slug;
        $slug = array_merge($slug, get_the_categories( $cat->term_id, $cat->slug ));
    }
    return $slug;
}