From the Metro site, looks like the best bet is:
Service Number 682 Route Halifax - Bradford	
Leave 21:46	 Odsal, Odsal Top, 	
Arrive 22:01	 Bradford City Centre, Interchange, Stand V 
The 2 alternatives are:
Service Number 645 Route  Buttershaw - Greengates Circular	
Leave 21:38	 Odsal, Odsal Top,
Arrive 21:49	 Bradford City Centre, Market Street (a couple of minutes walk from interchange up Bridge Street)
Service Number 625 Route Brighouse - Baildon	
Leave 21:53	 Odsal, Odsal Top,
Arrive 22:04	 Bradford City Centre, Interchange, Stand Z 
But I could be wrong 
