I'm trying to add a custom dropdown with (select/options) in my magento grid but it doesn't work, I tried with

```
$this->addColumn('dropdown', array(
'header' => Mage::helper('catalog')->__('Dropdown'),
'filter'    => false,
'sortable'  => false,
'type'=> 'options',
'options' => array('First'=>'firstvalue', 'second' =>'secondvalue')
));

```

I'm not using value from database but from an API, at first I want to display this select dropdown on my grid but all I see is a blank space.   

Thanks.

**EDIT :**

[![Example](https://i.stack.imgur.com/rsAla.png)](https://i.stack.imgur.com/rsAla.png)

Actually what I need to do is the first row with the dropdown, and the second row is what i get with the code I provided.  

I can add a link like the "view" column but it doesn't work for a dropdown