AngularJS ng-options sort alphabetical - angularjs

Question

I have a group of dropdown options, each of which have a list of values. I am trying to get the names of each of those to sort in alphabetical order. Below is the code.
<div class="row">
<div class="col-xs-12 col-sm-12 col-md-12">
<div>
<form class="form-horizontal">
<div class='form-horizontal range-date'>
<div class="input-daterange input-group text-center" id="datepicker">
<input class="pull-right date-size" name="startDate" type="text" placeholder="Start" class="form-control ">
<span class="input-group-addon">To</span>
<input class="pull-left date-size" name="endDate" type="text" placeholder="End" class="form-control">
</div>
</div>
<div id='query_messages' class='alert alert-danger'></div>
<div ng-repeat="item_query in items_query">
<div class="form-group">
<label class="control-label col-lg-2 pad-o">
<span ng-bind="Label{{item_query}}"></span>
</label>
<div class="col-lg-10" ng-if="item_query!=12">
<select ng-model="queryParam[item_query]" ng-options="item.name for item in optionsParam{{item_query}} track by item.id | orderBy: 'item.name'"
ng-change="change(queryParam[item_query])"
ng-attr-id="query_select{{item_query}}" class="selectpicker class_id{{item_query}} "
multiple data-selected-text-format="count>0" title='Choose any of the following'
data-queue-watcher>
</select>
</div>
<div class="col-lg-10" ng-if="item_query==12">
<select ng-model="queryParam[item_query]" ng-options="item.name for item in optionsParam{{item_query}} track by item.id | orderBy: 'item.name'"
ng-change="change(queryParam[item_query])"
ng-attr-id="query_select{{item_query}}" class="selectpicker class_id{{item_query}} "
multiple data-selected-text-format="count>0" title='Choose one of the following'
data-queue-watcher>
</select>
</div>
</div>
</div>
</form>
</div>
</div>
</div>