<div class="tab-frame">
<input type="radio" checked name="tab" id="tab1">
<label for="tab1">tab1</label>
<input type="radio" name="tab" id="tab2">
<label for="tab2">tab2</label>
<div class="tab">sample content 1</div>
</div>
<div class="tab">sample content 2</div>