var data = [ {text_name:'My life' , score: [{name : 'james',score: 10} , 

                                           {name : 'john',score : 40} , 

                                           {name : 'Abu',score : 80}] },

              {text_name:'The game real', score: [{name : 'penny',score: 30},

                                           {name : 'john',score : 20} , 

                                           {name : 'Abu',score : 30}] }];

​

var d = data.map(function(d) {

  return d.score.sort(function(a, b) {

    return a.score + b.score;

  });

});

​

console.log(d);

​