Add .disabled to a .list-group-item to gray it out to appear disabled.

Cras justo odio Dapibus ac facilisis in Morbi leo risus Porta ac consectetur ac Vestibulum at eros
{% highlight html %}
Cras justo odio Dapibus ac facilisis in Morbi leo risus Porta ac consectetur ac Vestibulum at eros
{% endhighlight %}