Reizer Gábor wrote :
How can I take Login link from the top-right-hand side
of the wiki's pages
to another place?
The best solution could be if Login link can be found near 'article',
'discussion',... tabs.
you'll need to modify the file skins/monobook.php in your installation folder
(assuming you're using monobook skin)
Possibly you'll also have to modify skins/monobook/main.css or add css modifications
to the [[Mediawiki:Monobook.css]] page of your wiki