L1 Visa Extension, stamping and My Wifes L2 visa processing

Hello,

My Visa Status

L1B Visa - Expiry 24 July 2015

I797B - Expiry 24 July 2015

My Employer has applied for extension.

im awaiting results for same. I want bring my wife after extension is granted.

question here, should I have to go to India after extension, get stamping, process my wifes visa

or

can I stay here, process my wife’s visa from with my extension approval Notice without me being there physically.

What can I do to reduce my traveling cost and time

Thanks

Vikram