When a column is editable, you can select how end-users will edit it. This is controlled by the edittype property and current has five different options - text, textarea, select, password, checkbox.
In addition to that, you can specify the values end-users will see in name:value pairs in the editoption values property of Columns - this is especially useful for SearchType DropDown. Here is an example
$grid->setColProperty("CustomerID",array("editoptions"=>array("value"=>"1:One;2:Two")));
There is a more easy way - in this case you just need to call setSelect function and set either SQL or array of values.
check the PHP tab for details.
Also in the example we show how the select can be updated from the user - add edit or delete data from it