This is creating an error, probably use this instead? $html .= $this->select_tag('data['.$this->model_name.']['.$field_name.']', $options);

[gilbertk88]

https://github.com/tombenner/wp-mvc/blob/abeb610140911721f1e1eae0d3c3c53bd5535ed0/core/helpers/mvc_form_helper.php#L214

[cyberscribe]

Thanks. Can you make sure we have isset() checks in place for this and we can merge in the pull request?