Drop down menu

as a?
Where are sub categories in this menu?
Could this help?
https://www.youtube.com/watch?v=4LRQQsFgNHg

p.s.
About your “circles background” take a look at this:
http://www.themesandco.com/snippet/adjust-sitewide-background-text-colorsize/

Step4. Use that and change “pink” to “black”.

Hmm I see. Could you try disabling all your plug-ins and see what happens?
You have this:

<ul class="sub-menu"><li style="display:none;"></li>

First the ul class should be “dropdown-menu”
and that additional empty li.. don’t know why is there 😀