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

app.controller('appCtrl', function ($scope) {

});

<section ng-app="app">
    <section ng-controller="appCtrl" class="panel-body">
        <ul class="nav nav-tabs" ng-init="activeTab = 'details'">
            <li ng-class="{ active: activeTab === 'details' }">
                <a ng-click="activeTab = 'details'" href="#">Details</a>
            </li>
            <li ng-class="{ active: activeTab === 'options' }">
                <a ng-click="activeTab = 'options'" href="#">Options</a>
            </li>
            <li ng-class="{ active: activeTab === 'other' }">
                <a ng-click="activeTab = 'other'" href="#">Other</a>
            </li>
        </ul>

        <div class="tab-content">
            <div class="tab-pane" ng-class="{ active: activeTab === 'details' }">Details tab content.</div>
            <div class="tab-pane" ng-class="{ active: activeTab === 'options' }">Options tab content.</div>
            <div class="tab-pane" ng-class="{ active: activeTab === 'other' }">Other tab content.</div>
        </div>
    </section>
</section>