Hi @frankster1234
I believe you can do it like this:
function my_acf_prepare_field( $field ) {
$field['label'] = "Changed Label";
$field['instructions'] = "Changed Instruction";
return $field;
}
add_filter('acf/prepare_field/name=_post_title', 'my_acf_prepare_field');
To learn more about this hook, please take a look at this page: https://www.advancedcustomfields.com/resources/acfprepare_field/.
Hope this helps 🙂