In open cart admin, there are always/usually 3 files
1. a controller file - holds the instructions
2. a model file - calls stuff from the database
3. a template file - the .tpls
aditionally, for the .tpls there are lists and forms
In our case, you want lists so look for admin/view/theme/catalog/product_list.tpl
and wherever you see the word 'model' copy it and replace the word 'model' with 'sku'
then go to the controller file which is admin/controller/catalog/product.php
and go the section that starts as
it's a list. (if it was a form, it would be getForm)
and copy all the lines that say 'model' and replace it with 'sku' but be careful with 'model' as model also means the model file so dont' copy things that look like:
$this->load->model or $this->model
then go look to see if it works
if it doesn't work, then we also need to get stuff from the database so go to the model file and find the word 'model' and do the same again.
actually, you may hav to go to the model file anyway for filter and sort
admin/model/catalog/product.php
for the order list, do the same but it is now in sale/order
if you can understand this structure, you're empowered to mod open cart
open cart is so easy to mod. Just do a monkey-see-monkey-do and magic happens
