function parse_simple_tag($string, $ereg_tag, $replaces) {

            $matches = array();

        ereg($ereg_tag,  $string, $matches);

        foreach( $matches as $num => $value) {

          $tag_value = explode($value,'=');

          str_replace($value, $replaces[0].$tag_value[0].$replaces[1] ,$string);

        }

$s = preg_replace("/\[color=(blue|red|green|purple|black|gray|brown|[0-9A-F]{6})]/i", "<span style=\"color:\\1\">", $s);