I have just installed Flans mod recently. I did exactly everything in the installation guide, but when I launch the game, I found that my Flans mod only shows some coloured blocks of wool. I tried to install some content packs to see if it could change anything. I put every content packs into the "Flan" folder and it was no use at all. Only a few more items appeared, and the rest was still the same as it was. I'm done and I don't know what to do more about this.
My Flans version is 4.10 for minecraft 1.7.10, and I used some content packs made by LabJac

The wool is just a placeholder for a thing which rotates round the item in each tab, The wool replaces the icon for an empty tab.

So do you know any solution to this problem?

Most probably means that there isn't any more content loaded.
Check if the content-pack .zip's shouldn't be unpacked, maybe there is another zip inside?

Ok, I had checked it and found that my content packs were unzipped. Now everything works normally, thanks.

it does'nt work for me, im still trying but can someone please post a pic of what there mod folder looks like?

Content Packs go into the .minecraft/Flan/ folder,
only the FlansMod jar goes to mods?