Hello,
You can use two sitemap web parts (one of each column) and specify its
WHERE condition property to split your content in two. Let's say your document tree has 20 documents on a first level of the document hierarchy so the
where conditions would look like this:
Site map 1:WHERE condition: (NodeOrder < 11 AND NodeLevel < 2) OR (NodeLevel > 1)
Site map 2:WHERE condition: (NodeOrder > 10 AND NodeLevel < 2) OR (NodeLevel > 1)
Best regards,
Jan Hermann