"Laksa" in KL is not quite the same dish as "Laksa" in Singapoe. Over in KL "Laksa" is a sourish fish-based noodle dish with a somewhat pungent smell.

If you are looking for something similar to Singapore's "Laksa", look out for "Curry Mee" or "Curry Laksa". Apart from Suria KLCC (near the Traders), there is also a foodcourt at the basement of the Pavillion Mall (opposite the Westin).