function bb_parse($string)
{
$tags = 'b|i|size|color|center|quote|url|img|video';
while (preg_match_all('`\[('.$tags.')=?(.*?)\](.+?)\[/\1\]`', $string, $matches)) foreach ($matches[0] as $key => $match) {
list($tag, $param, $innertext) = array($matches[1][$key], $matches[2][$key], $matches[3][$key]);