TObjArray *GetColumns(const TString &str)
{
   TPRegexp r("\"([\\w\\s,]+)\",?");

   TObjArray *colL = new TObjArray();
   colL->SetOwner();
   Int_t start = 0;
   while (1) {
     TString subStr = str(r,start);
     const TString stripStr = subStr.Strip(TString::kTrailing,',');
     colL->Add(new TObjString(stripStr));
     const Int_t l = subStr.Length();
     if (l<=0) break;
     start += l;
   }

   return colL;
}

void bla()
{
   TObjArray *col1L = GetColumns("\"12\",\"13\",\"14\",\"15\"");
   for (Int_t i = 0; i < col1L->GetLast()+1; i++)
     std::cout << ((TObjString *)col1L->At(i))->GetString() << std::endl;

   TObjArray *col2L = GetColumns("\"My first\",\"My second\",\"My third,fourth\",\"My seventh, eighth\""); 
   for (Int_t i = 0; i < col2L->GetLast()+1; i++)
     std::cout << ((TObjString *)col2L->At(i))->GetString() << std::endl;
}