strangely familiar to this, 但它是不同的，所以这里有一个修改过的版本
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
// what happens now actually is the opposite,
// we end up using the latest category that has a parent
usort( $cats, \'_usort_terms_by_ID\' ); // order by ID
foreach( $cats as $cat ) {
if ( $cat->parent ) {
// If there are parent categories, collect them and pick the top most
$parentcats = explode(" ",get_category_parents( $cat, false, \' \', true ));
$topcat = $parentcats[0];
} else {
$topcat = $cat->slug;
}
}
}
$permalink = home_url()."/".$topcat."/".$post->post_name;
return $permalink;
}
