Egg Tab - Fabric
Click here for the Forge version of this mod.
Egg Tab is a client-side Minecraft mod that moves all mob spawn eggs to a new "Spawn Eggs" creative tab. It also adds an "Enchanted Books" tab. Both tabs can be toggled (through mod menu or config file). This mod also works with mods that add additional spawn eggs.
Screenshot
Here is a picture showing the tab in action:
