将下面代码添加到主题functions.php里

function san_add_taxonomies_to_pages() {
	register_taxonomy_for_object_type( 'post_tag', 'page' );
	register_taxonomy_for_object_type( 'category', 'page' );
}
 
add_action( 'init', 'san_add_taxonomies_to_pages' );
if ( ! is_admin() ) {
	add_action( 'pre_get_posts', 'san_category_and_tag_archives' );
}
 
function san_category_and_tag_archives( $wp_query ) {
	$my_san_post_array = array('post','page');
	if ( $wp_query->get( 'category_name' ) || $wp_query->get( 'cat' ) )
		$wp_query->set( 'post_type', $my_san_post_array );
 
	if ( $wp_query->get( 'tag' ) )
		$wp_query->set( 'post_type', $my_san_post_array );
}