Probably best to use the href tag:
HTML:
<a href="hidden_one">one</a>
<div id="hidden_one">Hide 1</div>
<a href="hidden_two">two</a>
<div id="hidden_two">Hide 2</div>
<a href="hidden_three">three</a>
<div id="hidden_three">Hide 3</div>
<a href="hidden_four">four</a>
<div id="hidden_four">Hide 4</div>
JavaScript:
$('a').on('click',function(e) {
e.preventDefault();
var href = $(this).attr("href");
$("#" + href).slideToggle().siblings('div').hide();
});