Edit in JSFiddle

$('.dropdown-toggle').on('click', function(e) {
    if(!window.console) {
        console.log('Clicked');
    }
    e.preventDefault();
    $('.dropdown-menu').toggle();
});

<ul>
    <li class="dropdown">
        <a href="#" class="dropdown-toggle">Video Games</a>
        <ul class="dropdown-menu">
            <li>Mario</li>
            <li>Zelda</li>
            <li>Sonic</li>
        </ul>
    </li>
    <li>Board Games</li>
    <li>Street Games</li>
</ul>

.dropdown-menu {
    display: none;
}