How to cut this tag out in php?

[APerfectCircle]

I want cut out everything inside (tags included) from text, for ex:\[code\]something\[/code\]but with one condition, inside of \[code\]\[/code\] tag there would be \[code...e\][url=http://xxx.com]anything[img]something\[/code\]can anyone help? im bad with regular expressions, or there is easier way?