title: How to add custom tab on product detail page in admin side (Opencart)
body: <p>I am having a store in opencart.</p>
  
  <p>Simply i need to put on custom field in the product detail section see the screenshot you will get the idea.</p>
  
  <p><a href="https://i.stack.imgur.com/t0Vqw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/t0Vqw.png" alt="enter image description here"></a></p>
  
  <p>It should behave like other tabs.</p>
  
  <p>I do not wish to change the product_form.tpl core file directly as i am developing the opencart extension.</p>