$re = '/\[([^\[\]]+)\]/m';
$str = 'public static int[] BigLogoArr = [100,100] ;// процент видности второй и третьей картинки логотипа
public static TSound ThrowSound []=[BM.SoundLoad("_Incbin/Sounds/Throw")];
private int BloodColor[]=[100,10,10] ;// Цвет крови игрока
Local ShadowDistance[]=[-2,-2];
Local ShadowColor[]=[15,57,12];// уже *2
//x y z
private int PrimHandPos[]=[2,2,8];
private int SecHandPos[]=[1,-1,8];
private int CrawlHandPos[]=[2,0,2];
';
$subst = "{$1}";
$result = preg_replace($re, $subst, $str);
echo "The result of the substitution is ".$result;
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php