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

Features:

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

Demo:
Admin:
https://oc4.secretsergey.com/admin/
Username: demo
Password: demo

Relevant links:
Admin Simplified Product
Admin Simplified Category
Admin Simplified Information

1. Login to your OpenCart Administration panel;
   
2. If you are not using the different versions of the extension (Admin Simplified Category, Admin Simplified Information, Admin Simplified Product), then go to step 6;
   
3. Go to Extension > Extensions and select "Other" on dropdown list;
   
4. Find the extensions (Admin Simplified Category, Admin Simplified Information, Admin Simplified Product) in the list below and uninstall it;
   
5. Go to Extensions > Installer, uninstall and delete extensions (Admin Simplified Category, Admin Simplified Information, Admin Simplified Product) here;
   
6. Go to Extensions > Installer and upload zip file suited for your OpenCart version;
   
7. After successful installation, find the extension in the list below and install it;
   
8. Go to Extension > Extensions and select "Other" on dropdown list;
   
9. Find the extension in the list below and install it;
   
10. 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!