We visited the Sneaker Street (75 Fa Yuen Street) to buy shoes. This is a shoe shopping heaven where you will definitely find a item that suit your budget.
All the shoe stores are line up side by side. The shoppers will be spoilt for choice and thus you may need to spend some time walking through all the stores.
The nearest MTR is Mongkok station. Look out for the exit leading to Fa Yuen Street. It is at 75 Fa Yuen Street and Google Map will be your Best Friend to lead you there.
Queensway shopping in Singapore also have multiple shoe shops co-located together. But it is too old and out of touch with the tourists and local due to their location.