<a href="http://www.ya.ru" id="kkk">hhhhhh</a>
<script>
document.getElementById("kkk").addEventListener("click", function(e){e.preventDefault()}, false);
</script>
или
<a href="http://www.ya.ru" id="kkk">hhhhhh</a>
<script>
document.getElementById("kkk").onclick = function(){return false};
</script>
или
<a href="http://www.ya.ru" onclick="return false">hhhhhh</a>