Change values of user input in hook_field_validate?

Question

I have setup a custom field and have a validater setup for it. I would like to be able to adjust and actually change the user input from within my validator. so say this is a multi value field, each set of values shows up in $item. I have adjusted and changed the values in this function, but how I can I save them and make sure the rest of the form processes using the changed values?

mycustomfield_field_validate($obj_type, $object, $field, $instance,$langcode,   &$items, &$errors){

  foreach($items as $item){
  // validation check is here
  }    
}

Answer 1

Perhaps hook_field_attach_submit can be used in your case?