CSS Stop a list from splitting between columns

After a bit of research I still can't find what I'm looking for and want to make sure what I want is possible.

For a site map page I have lists of links each under a h3 tag but don't want a list split between the two columns.

Any clues?

Thanks

The CSS

    .info-col{
    max-width:720px;
    columns:350px 2;
    -webkit-columns:350px 2; /* Safari and Chrome */
    -moz-columns:350px 2; /* Firefox */
    }

    .info-blob{
}

The HTML

<div class="info-col">
  <div class="info-blob">
    <h3>Lorem ipsum</h3>
    <ul>
      <li><a href="#">Lorem ipsum dolor sit</a></li>
      <li><a href="#">Aliquam tincidunt mauri</a></li>
      <li><a href="#">Nunc dignissim risus id</a></li>
      <li><a href="#">Cras ornare tristique</a></li>
      <li><a href="#">Vivamus vestibulum nulla</a></li>
      <li><a href="#">Praesent placerat risus</a></li>
    </ul>
  </div>
  <div class="info-blob">
    <h3>Lorem ipsum</h3>
    <ul>
      <li><a href="#">Nunc dignissim risus id</a></li>
      <li><a href="#">Cras ornare tristique</a></li>
      <li><a href="#">Vivamus vestibulum nulla</a></li>
      <li><a href="#">Praesent placerat risus</a></li>
      <li><a href="#">Lorem ipsum dolor sit</a></li>
      <li><a href="#">Aliquam tincidunt mauri</a>
        <ul>
          <li><a href="#">Nunc dignissim risus id</a></li>
          <li><a href="#">Cras ornare tristique</a></li>
          <li><a href="#">Vivamus vestibulum nulla</a></li>
          <li><a href="#">Praesent placerat risus</a></li>
        </ul>
      </li>
    </ul>
  </div>
  <div class="info-blob">
    <h3>Lorem ipsum</h3>
    <ul>
      <li><a href="#">Lorem ipsum dolor sit</a></li>
      <li><a href="#">Aliquam tincidunt mauri</a></li>
      <li><a href="#">Nunc dignissim risus id</a></li>
      <li><a href="#">Cras ornare tristique</a></li>
      <li><a href="#">Vivamus vestibulum nulla</a></li>
      <li><a href="#">Praesent placerat risus</a></li>
    </ul>
  </div>
  <div class="info-blob">
    <h3>Lorem ipsum</h3>
    <ul>
      <li><a href="#">Vivamus vestibulum nulla</a></li>
      <li><a href="#">Praesent placerat risus</a></li>
      <li><a href="#">Lorem ipsum dolor sit</a></li>
      <li><a href="#">Aliquam tincidunt mauri</a></li>
      <li><a href="#">Nunc dignissim risus id</a></li>
      <li><a href="#">Cras ornare tristique</a></li>
      <li><a href="#">Vivamus vestibulum nulla</a></li>
      <li><a href="#">Praesent placerat risus</a></li>
    </ul>
  </div>
</div>