4-scope.html

<!DOCTYPE html>
<html ng-app="plunker">

<head>
  <meta charset="utf-8"/>
  <title>AngularJS Plunker</title>
  <link rel="stylesheet" href="style.css"/>
  <script src="angular.js"></script>
</head>

<body ng-controller="MainCtrl">
<ul>
  <li ng-repeat="item in arr1 track by $index">
    <span>{{$id}}</span>
    <ul>
      <li ng-repeat="item in arr1 track by $index">
        <span>{{$id}}</span>
        <input ng-model="abc">
      </li>
    </ul>
  </li>
</ul>
</body>

<style>
  .ng-scope {
    border: solid 1px #0066cc;
    margin: 5px;
  }
</style>

<script>
  scopeHash = {};

  var app = angular.module('plunker', []);

  app.controller('MainCtrl', function ($scope) {
    $scope.arr1 = [1, 2, 3, 4, 5, 6, 7, 8];
    $scope.arr2 = [1, 2, 3, 4, 5, 6, 7, 8];
  });

</script>

</html>