Stop displaying Login, Create an Account, Forgot Password links

web site: http://bit.ly/1DgD3dI

I'm in a Wordpress multisite framework.

I want all my users to register and login from the main web site http://bit.ly/1DgD3dI

Is it possible to redirect all these links to the respective pages of the main web site or can I just hide those links from the theme?

Thanks in Advance!