If you want to choose your admin menu elements this extension is the best for your.

1, You can change the admin menu
2, You can choose hundreds of icons
3, You can set permission to the menu items.

Demo:
You can find the demo here:
(if you have any question feel free to ask)
http://egyedi-opencart.hu/opencart/3031/admin/
USER: admin
PASS: ABcd1234

Installation
Upload the contents of the upload folder to your OpenCart root.
Go to OpenCart Admin > Extensions > Modifications, and click Refresh
Go to OpenCart Admin > Extensions > Extensions and Install the module

If you have any question about the module feel free to ask
galpeter@galocaffe.hu