Hi again, thanks for trying to help. It has happened with every mod I have tried without exception. The first time I downloaded the mods was a few weeks back (been trying to fix it since then). I first downloaded a few at one time which were animal bikes, doggy talents and Shipwreck (all from minecraftsix). The header page shows the new mods.
I tried starting a new world to see if it was just the old world that was messed up but no, both are affected. I deleted them all and then tried reinstalling one at a time. Same result. I also tried Wands and Wizardy 1.8/1.7.1 from minecraft time, lucky block 1.8 from minecraftfile.com and minions mod 1.8/1.7.10 later, all separately, all with the same problems...
Then last weekend after I had reinstalled forge (and selected the new forge in the header page) I tried again and downloaded More bows M1.8-2.0.0a2.jar from Minecraft Curse forge. Again the menus were all messed up and the bows looked all wrong; one was just a yellow square ( I have seen this with a couple of previous mods I have tried to download). I deleted that mod and then tried Animal plus and Animal Bikes both from the MCF Mod List. Same thing every time, menus all messed up and the landscape changed to fit the messed up menus. The menus are not always messed up the same way but most items are not what they say they should be, and any new icons don't look the way they should - one may be a yellow square, or a fuzzy picture for example. Every time as soon as I delete the mods from the mods folder the game plays normally i.e. the menus are back to normal as is the landscape.