Dependent Tier 1 extension or ILR -- Pls advise

My wife initial Tier 1 Dependent visa issued on oct 2012
Got Extended on Sep 2013 at time of my ILR has been granted.
Get expiring on Sep 2015. 6 months ago i have convert my ILR to British citizen.

Can my wife eligible for Dependent ILR for this time or should i go tier 1 Dependent extension again?
Any difference to my wife visa status being a British citizen?

Appreciate your inputs.

She needs 5 years residence at Tier 1 dependent to qualify for ILR. A PBS Dep extension application should be given for 2 years so that she meets the requirement for ILR.

I suspect that if she switches to FLR(M), she might have to wait a further 5 years in this category (2 x 2.5 years) because her current visa was granted after the rule changes in July 2012 and would mean that the time already spent in the UK cannot be counted towards the new 5 year period if she switches.