这应该是可能的。首先，你很幸运www.mytravelblog.com/jakarta/myPostName/ 已经可以使用了，它会向您显示帖子，不会将您重定向到较长的版本（至少在我看来是可行的）。这意味着您只需处理生成的链接，而不必干扰传入URL的处理方式或“规范化”。

结果get_permalink(), 将通过post_link. 所以你可以这样做：

add_filter( \'post_link\', \'remove_parent_cats_from_link\', 10, 3 );
function remove_parent_cats_from_link( $permalink, $post, $leavename )
{
    $cats = get_the_category( $post->ID );
    if ( $cats ) {
        // Make sure we use the same start cat as the permalink generator
        usort( $cats, \'_usort_terms_by_ID\' ); // order by ID
        $category = $cats[0]->slug;
        if ( $parent = $cats[0]->parent ) {
            // If there are parent categories, collect them and replace them in the link
            $parentcats = get_category_parents( $parent, false, \'/\', true );
            // str_replace() is not the best solution if you can have duplicates:
            // myexamplesite.com/luxemburg/luxemburg/ will be stripped down to myexamplesite.com/
            // But if you don\'t expect that, it should work
            $permalink = str_replace( $parentcats, \'\', $permalink );
        }
    }
    return $permalink;
}