This tutorial is going to show you how to use the New Product Filters in OpenCart.
Log into the admin panel of your site. From the top menu select “Catalog” -> “Filters”.
Next, click the “insert” button on the right to add the filters. Product Filters are added in the same way as product options. Below there is an example of the filter group titled “Rock/Pop” and several filter options in that group E.g. Bass Collections, Big Band etc.
Save the changes by clicking "Save" at the top right. Now link the products filters you have just added to the actual product. Go to the top menu "Catalog" -> "Products".
Click "Edit" on one of the products, on the manage product screen choose the “Links” tab and look for the “Filters” section.
The “Filter” box is a standard auto complete box. Simply type in a part of the filter name. Add as many filters you wish the product to belong to. Save your changes when finished.
Now link the filter to the category page. Go to the top menu "Catalog" -> "Categories".
Click "Edit" on the categories which products have filters assigned to. Choose the “Data” tab and look for the “Filters” section. Type in a part of the filter name to add the same filters added to your сategories. Save your changes when finished.
If this is the first time of using product filters, go to Extensions -> Modules -> Filter. Then click the “Edit” link. Click the “Add Module” button. If you want to display the filters in the right column of the category listing page, you should mirror the settings as follows – Layout: Category, Position: content left, Status: enabled. Once complete, click “Save”.
When you are done, go to the category page and you will see the new filter box:
Feel free to check the detailed video tutorial below: