jQueryで簡単アコーディオンメニューの作り方！

<div class="accordion">MENU</div>
<div class="accordion-content">
	<nav class="accordion-nav">
		<ul>
			<li><a href="#">Accordion nav1</a></li>
			<li><a href="#">Accordion nav2</a></li>
			<li><a href="#">Accordion nav3</a></li>
		</ul>
	</nav>
</div>

.accordion {
	border: 1px solid #ccc;
	border-radius: 3px;
	cursor: pointer;
	display: block;
	padding: 8px;
	text-align: center;
}

.accordion-content {
	display: none;
}

.accordion-nav ul {
	list-style: none;
	margin: 0;
	padding: 0;
}

.accordion-nav ul li a {
	border-bottom: dotted 1px #aaa;
	color: #333;
	display: block;
	padding: 8px;
	text-align: center;
	text-decoration: none;
}

.accordion-nav li a {
	border-bottom: dotted 1px #aaa;
	display: block;
	padding: 8px 0;
	text-align: center;
	text-decoration: none;
}

jQuery( '.accordion' ).on( 'click', function() {
	jQuery( '.accordion-content' ).slideToggle();
});