And here are the folders for Era on ios 7.1.x to use them with the tweak CustomFolderIcons. To get the tweak you need to add this repo: repo.fortysixandtwo.com.

Read the description to know how to use it and go with ifile into var/ mobile/ Library/ CustomFolderIcons and see the names that you need to add on your springboard for example : Utilities@2x will be on your springboard as Utilities.