Install the dewey. extension to Chrome
Grab your bookmarks from Twitter
Select the bookmarks you want to export. You can select either a few or click 'Select All' to select all bookmarks in a collection or your main 'My Bookmarks' folder.
Click 'Export' in the Action Bar and choose your format - either a CSV containing the Bookmarks, Tags and Notes or copy to your Clipboard to paste where you'd like.
That's it. Now go pur your Twitter Bookmarks to use.