Custom ValidationSummary template Asp.net MVC 3

I am working on a project with Asp.Net MVC3

In a View I have @Html.ValidationSummary(true) and as usually it produces

<div class="validation-summary-errors">
    <ul>
        <li>Something bad Happened!</li>
    </ul>
</div>

How can I extend this ValidationSummary to MyValidationSummary and produces the Html Code template something like this:

<div class="notification warning"> 
    <span></span> 
    <div class="text"> <p>Something bad Happened!</p> </div> 
</div>