I have an existing website in Joomla 2.5.28.
I'd like to tweak it to be more responsive based on viewport/device.
For example, I'd like the horizontal menu to fall veritcle on smartphones.
I see a "mobile menu" option... is there a way to utilize it?
Refer below link
http://extensions.joomla.org/extension/responsivizer
http://www.joomlart.com/joomla/templates