Make a (sub)directory on your hard drive named "HubPages".
Make subdirectories under that, each one named the title of a Hub.
Go to each Hub on the HubPages site. In Firefox (sorry, I don't give instructions encouraging use of Microsucks I.E.), click on "File | Save Page as..." In the popup window, navigate on your hard drive to the appropriate subdirectory. Select "Web Page, HTML only" in the "Save as Type" box. Click "Save".
If you want to save all the pictures, too, Select "Web Page, complete", instead of "Web Page, HMTL only".