I have a widget for a field as shown below:

I would like to make the text field ('script_paths') an unlimited value so that the user can add as many as they like. Is there a way to do this? Maybe there is a property I add in my code below:
function mango_field_widget_form(&$form, &$form_state, $field, $instance, $langcode, $items, $delta, $element) { $field_name = $instance['field_name']; $required = $element['#required']; $item =& $items[$delta]; $element += array( '#type' => 'fieldset', ); $element['enabled'] = array( '#title' => t('Enabled'), '#type' => 'checkbox', '#default_value' => isset($item['enabled']) ? $item['enbled'] : '', ); $element['script_paths'] = array( '#title' => t('Script Paths'), '#type' => 'textfield', '#default_value' => isset($item['script_paths']) ? $item['script_paths'] : '', ); return $element; }