var data = [['your name', 'myvalue'], ['myr name', 'thivalue']];

function string_join(data) {
  var str = '', arr = [];
  for (var i = 0; i < data.length; i++) {
   for (var j = 0; j < data[i].length; j++) {
    data[i][j] = slash(data[i][j]);
   }
   arr.push(data[i].join('/'));
  }
  return arr.join(',');
}

function slash(string) {
 return String(string).replace(/[\\/,]/g, '\\$&');
}

function string_split(string) {
 var c,
   cur_str = '',
   cache = [],
   result = [];
 for (var i = 0; i < string.length; i++) {
  c = string.charAt(i);
  switch(c) {
   case '\\':
    cur_str += string.charAt(++i);
    break;
   case '/':
    cache.push(cur_str);
    cur_str = '';
    break;
   case ',':
    cache.push(cur_str);
    cur_str = '';
    result.push(cache);
    cache = [];
    break;
   default:
    cur_str += c;
  }
 }

 if (cur_str.length) {
  cache.push(cur_str);
 }

 if (cache.length) {
  result.push(cache);
 }

 return result;
}

var before = string_join(data);
console.log(before);
var after = string_split(before);
console.log(after);