Can anybody tell me how will I get "time" under "Animate" tab in tecplot 360?

I am only getting "Zones" under the " Animate" tab after loading the CGNS file.

Normally CFX writes a single time step per CGNS file. So, if you have not already exported all your "trn" files, you will have to do it first. Then, you will have to combine all of them in a single file, but the easiest way is to use a Tecplot add-in for importing multiple transient files, which you can find at the Tecplot on-line community. Then, you will have to associate the zones to time steps, with another add-in, which is the "strand editor", found at the same place. You must have a recent Tecplot update installed. Good luck!