Remove Li Tag

http://codex.wordpress.org/Function_Reference/get_archives

the article has some examples

as is says, get_archives() is depracated, so while you are working on your template files, replace it with the newer function wp_get_archives()

http://codex.wordpress.org/Template_Tags/wp_get_archives

(the codex is the documentation of wordpress; any time you come across some questions about wordpress functions or template tags, simply use the web search – for instance ‘get_archive() wordpress codex’ – this should give you at least one link to the right chapter of the codex, where you can read up on the functions you have trouble with.)

if you have tried your interpretation of the docu and are stuck, you can still come back and ask here in the forum, describing what you have tried so far, and where it did not work….

it says in the docu, if you use format=custom, you need to use the before and after parameter as well.

try, for instance:

<?php wp_get_archives('type=postbypost&limit=20&format=custom&after=<br/>'); ?>