Simple CoffeeScript navigation menu
You're building a navigation, however there are no links. It's highly recommended to use anchor tags for linking purposes.

Your naming is a bit loose. What is personal in your context? Please specify that. Even something like personal-navigation is quite loose, but still better.

I've changed your markup a bit to reflect my small suggestions. Note that I changed the ID's from your list items to classes. ID's are only for elements which will occur only once a page in any situation. You can't say that for sure for single navigation items.

    &lt;nav id="personal-navigation"&gt;
        &lt;ul class="clearfix"&gt;
            &lt;li class="personal-info"&gt;&lt;a href="#"&gt;Info&lt;/a&gt;&lt;/li&gt;
            &lt;li class="personal-orders"&gt;&lt;a href="#"&gt;Orders&lt;/a&gt;&lt;/li&gt;
            &lt;li class="personal-models"&gt;&lt;a href="#"&gt;Models&lt;/a&gt;&lt;/li&gt;
            &lt;li class="personal-balance"&gt;&lt;a href="#"&gt;Balance&lt;/a&gt;&lt;/li&gt;
        &lt;/ul&gt;
    &lt;/nav&gt;

    &lt;div id="personal-content"&gt;&lt;/div&gt;