What this extension does:
With this extension, you can simplify adding categories.

Features:

• Hiding fields on adding category page;
  
• Hiding tabs on adding category page;
  
• Include 2 views: tabs and single page;
  
• No core files are changed or replaced.

Demo:
Admin:
https://oc4.secretsergey.com/admin/index.php?route=catalog/category.form&category_id=33
Username: demo
Password: demo
* This demo use the pack version of extension

Relevant links:
Admin Simplified Pack
Admin Simplified Product
Admin Simplified Information

How to install (4.x):

1. Login to your OpenCart Administration panel;
   
2. Go to Extensions > Installer and upload zip file suited for your OpenCart version;
   
3. After successful installation, find the extension in the list below and install it;
   
4. Go to Extension > Extensions and select "Other" on dropdown list;
   
5. Find the extension in the list below and install it;
   
6. Configure the extension and save the settings.

Support:
Email - sergey@secretsergey.com
Telegram - t.me/secretsergey

I will be grateful for the evaluation and feedback on the extension page.
Thanks for your choice!