Migrate Multicolumn to Gridelements for TYPO3 CMS
Migrates multicolumn containers to gridelements containers, since both have a different DB structure but still enough in common so this can work. However, both extension are customizable and it is therefore impossible to make it work with every custom configuration. USE AT YOUR OWN RISK and MAKE BACKUPS of your database.
Read more: http://docs.typo3.org/typo3cms/extensions/brainmulticolumntogridelements/