Those icons were added with the code that has been explained on http://forum.muffingroup.com/betheme/discussion/94/mega-menu-icons but the yellow item we made with custom css. All custom css's you can find under Theme options > Custom CSS & JS > Custom CSS section.
We are sorry. The instruction of how we added this menu item above was wrong because for that page we did it different. Instead of simple/default Navigation Label for menu item, we used the following code:
Comments
the list of all images used for this pre-made layout, we paste below:
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M I N I N G
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Flickr:
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Bert Kaufmann
https://www.flickr.com/photos/22746515@N02/
Grand Canyon National Park
https://www.flickr.com/photos/grand_canyon_nps/
Bureau of Land Management
https://www.flickr.com/photos/mypubliclands/
martin
https://www.flickr.com/photos/x1klima/
Photodune:
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Mining in the quarry
http://photodune.net/item/mining-in-the-quarry/1473452?s_phrase=mining&s_rank=43
Other:
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50 free construction icons for iOS tab bars & toolbars
http://www.pixellove.com/free-ios-construction-icons
Painted Wood Logo MockUp
http://graphicburger.com/painted-wood-logo-mock-up/
3 Photorealistic Logo MockUps
http://graphicburger.com/3-photorealistic-logo-mockups/
Embroidered Logo MockUp
http://graphicburger.com/embroidered-logo-mockup/
Letterpress Logo Mockup (PSD)
http://www.graphicsfuel.com/2013/11/letterpress-logo-mockup-psd/
Subtle Patterns
subtlepatterns.com
Smazzy Maps
https://snazzymaps.com/