Magento – Magento 1.9.1 – Unable to edit (click) URL Rewrite fields in backend

In Magento Enterprise 1.13 (or 1.12) url_key attribute was moved to its own table catalog_category_entiry_url_key (similarly product url_key attribute has its own table catalog_product_entiry_url_key). Also in 1.13 indexers were changed and are now run by the cronjob instead of manually. The problem is that indexer only takes values from catalog_category_entity_(varchar|int|decimal|text|datetime) and not catalog_category_entiry_url_key. Quick fix is to create a new module and rewrite enterprise_catalog/index_action_category_flat_refresh model with:

<enterprise_catalog>
    <rewrite>
        <index_action_category_flat_refresh>Mynamespace_Mymodule_Model_Refresh</index_action_category_flat_refresh>
    </rewrite>
</enterprise_catalog>

and in the class add url_key to $attributesType array

class Mynamespace_Mymodule_Model_Refresh extends Enterprise_Catalog_Model_Index_Action_Category_Flat_Refresh {

/**
 * Return attribute values for given entities and store
 *
 * @param array $entityIds
 * @param integer $storeId
 * @return array
 */
protected function _getAttributeValues($entityIds, $storeId) {
    if (!is_array($entityIds)) {
        $entityIds = array($entityIds);
    }
    $values = array();

    foreach ($entityIds as $entityId) {
        $values[$entityId] = array();
    }
    $attributes = $this->_getAttributes();
    $attributesType = array(
        'varchar',
        'int',
        'decimal',
        'text',
        'datetime',
        'url_key'   //add url_key to attributes type; otherwise url_key value will not be saved in the flat tables
                    //as it was moved to its own table in EE 1.13
    );
    foreach ($attributesType as $type) {
        foreach ($this->_getAttributeTypeValues($type, $entityIds, $storeId) as $row) {
            if (isset($row['entity_id']) && isset($row['attribute_id'])) {
                $attributeId = $row['attribute_id'];
                if (isset($attributes[$attributeId])) {
                    $attributeCode = $attributes[$attributeId]['attribute_code'];
                    $values[$row['entity_id']][$attributeCode] = $row['value'];
                }
            }
        }
    }
    return $values;
    }

}

This will add url_key to flat tables during reindex but it probably won't work with MAGMI import module.

As for your delete button not working, you forgot the deleteAction..

  public function deleteAction()
{
    $brand = Mage::getModel('smashingmagazine_branddirectory/brand');

    if ($brandId = $this->getRequest()->getParam('id', false)) {
        $brand->load($brandId);
    }

    if ($brand->getId() _getSession()->addError(
            $this->__('This brand no longer exists.')
        );
        return $this->_redirect(
            'smashingmagazine_branddirectory_admin/brand/index'
        );
    }

    try {
        $brand->delete();

        $this->_getSession()->addSuccess(
            $this->__('The brand has been deleted.')
        );
    } catch (Exception $e) {
        Mage::logException($e);
        $this->_getSession()->addError($e->getMessage());
    }

    return $this->_redirect(
        'smashingmagazine_branddirectory_admin/brand/index'
    );
}