Dynamic select list in report based on other report column

I have a report with three columns. The first column is the Id, the second is the name that matches the Id. In the third column I would
like to have a list of values that are dependant on the Id in the first column.
This is the query I have.
SELECT c.category_id,
c.category_name,
APEX_ITEM.SELECT_LIST_FROM_QUERY(3, NULL,
'SELECT option_name, option_id
FROM invmodel_category_option
WHERE category_id = APEX_APPLICATION.G_F01('||rownum||')') AS options
FROM invmodel_model m,
invmodel_category c
WHERE m.model_id = :P2_MODEL_ID
This doesn't give any error, but I do not get any select list.
I have tried various other ways to reference the category_id within the APEX_ITEM function, including:
WHERE category_id = c.category_id (c.category_id is an invalid identifier)
WHERE category_id = ''#CATEGORY_ID#''' (number error)
As an example what I would like to see is
Id Name Options
1 Fruit Banana, Apple, Orange
2 Vegetable Carrot, Potato, Onion
Can anyone please tell me if this can be done, and how.
Thanks

This can be done if you follow this example:
http://apex.oracle.com/pls/otn/f?p=31517:176
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://htmldb.oracle.com/pls/otn/f?p=31517:1
-------------------------------------------------------------------

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Best Regards
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