arf_brfore_send_mail_chnage_value

add_filter('arf_brfore_send_mail_chnage_value', 'your_function', 10, 3);

function your_function($field, $entry_id, $form_id){



    //Customize field values.

    if($field->field_type == 'FIELD-TYPE'){

        $field->entry_value = 'CUSTOMIZE ENTRY VALUE';

    }



    return $field;

}