[Typo3] how can i create the repeatable data objects in another format

[zsl vincent]

HI
   in the tutotial 
http://typo3.org/documentation/document-library/doc_tut_ftb1/Content_Element_with/
i know how to create the repeatable data objects in this format:
-------------------------------------
link to this:
link one
limk two
...
link to that:
link one
link two
...
(of course We are able to create any number of these elements in any order)
---------------------------------------

but now how can i create the repeatable data structure in this 
format?the format is
------------------------
link to this:
link one,link two,link three,........
link to that:
link one,link two,link three,........
(of course we can also create any number of these elements in any order)
--------------------------
Thanks for any suggestion