Magento – Magento show custom attribute selected value while navigating from cart edit page

We can use 'depends' tag in system.xml in field which we have to show/hide depends on 'yes/no' field.

Below are syntax you can use:

<depends><enabled>1</enabled></depends>

In above syntax 'enabled' is a field with 'yes/no' values.

Above code is for system >> Configuration settings .

To add any field depends on 'yes/no' in product form you can use below code:

  $productField = $fieldset->addField('enabled', 'select', array(
        'label'     => Mage::helper('adminhtml')->__('Enabled'),
        'title'     => Mage::helper('adminhtml')->__('Enabled'),
        'name'      => 'enabled',
        'options'   => array(
            0 => Mage::helper('adminhtml')->__('No'),
            1 => Mage::helper('adminhtml')->__('Yes'),  
        ),
        'onclick' => 'toggleYesNo()',
    ));
    $productField->setAfterElementHtml('
        <script>
        function toggleFixedShipping() {
           $("idToShowHide").toggle();
        }
        </script>
    ');

Here 'idToShowHide' id will be show/hide field's ID.

I hope it solves your concern.

Try this:

echo $_product->getResource()->getAttribute('car_options')->getFrontend()->getValue($_product);