soloveff,
HTML ->
CSS ->
Script ->
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
.box-letter ul {
display:none;
}
.open-letter span:after {
content:' раскрыть';
}
</style>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script>
$(document).ready(function() {
$('.open-letter').click(function() {
$('div.box-letter ul').not($(this).next()).slideUp('normal');
$('.letter').addClass('open-letter');
$(this).removeClass('open-letter').next().slideDown('normal');
});
});
</script>
</head>
<body>
<div class="box-letter">
<div class="letter open-letter">
<b>1</b><span></span>
</div>
<ul>
<li><a href="#">1</a></li>
<li><a href="#">2</a></li>
<li><a href="#">3</a></li>
</ul>
</div>
<div class="box-letter">
<div class="letter open-letter">
<b>2</b><span></span>
</div>
<ul>
<li><a href="#">1</a></li>
<li><a href="#">2</a></li>
<li><a href="#">3</a></li>
</ul>
</div>
</body>
</html>