Can a cellular automata structure simulates another cellular automata structure? In Elementary Cellular Automata, rules can show one pattern, but i am wondering if there is something where a cellular automata structure can simulate another structure? 

Is there a category for this in Cellular Automata?
Any cellular automata that could be classified as a universal Turing machine would be able to do this. The Game of Life is one such cellular automata. Here is it (rather pointlessly) simulating itself on a larger scale. Here is a Turing machine implemented in it. This 'category' that you want is probably "cellular automata that qualify as universal Turing machines".
I suspect this question will be of interest to you.