title: How to select multiple selected value from select option
body: <p>My controller code looks like </p>
  
  <pre><code>$scope.items = [{
      heading: 'Sports',
      types: [{
          name: 'Football',
      }, {
          name: 'Persie',
      }, {
          name: 'Ronaldo',
      }, {
          name: 'Messy',
      }],
      id: '1'
  }, {
      heading: 'Cricket',
      types: [{
          name: 'Tendulkar',
      }, {
          name: 'Lara',
      }, {
          name: 'Ponting',
      }],
      id: '2'
  }];
  </code></pre>
  
  <p>My view contains something like this : 
      
       
  
  How can I get the selected values of options when user clicks submit button</p>