Is it popssible to change the shop list so i have all of the mods into the right catagories. (eg. not have guns in the actors section)

Edit: I forgot to mention I am not making a mod. I just need help organizing my installed mods.

Yes. Correct usage of add to category lines will avoid having weapons in the actors section.

Thank you.
Where do I edit this.
Is it in the individual mod .RTEs?

Yes.
Hopefully the mod will be well structured, and you will be able to find the item's section with relative ease. If all else fails, use windows search to search for files containing '<Press tab in notepad and copy-paste the result into here>AddToGroup = <Weapons/Actors/Tools, etc depending on the category it is going to inappropriately>'. Then go through the files given searching for the same. When you find those lines, check the nearest line that says 'PresetName = ' or 'InstanceName = ' (generally close above) and if the name there matches the weapon that is going into the wrong section, delete the entire AddToGroup line.