To preserve the forward slash in the custom URL slug for your Category Collection in Webflow, you can follow these steps:
1. Open your Webflow project and go to the Collection Editor.
2. Click on the Collection that contains your Category items (e.g., "Categories" or "Blog Categories").
3. In the Collection Editor, select the field that you want to modify to include the forward slash (e.g., "Slug" field).
4. Click on the "Field Settings" tab in the right sidebar.
5. In the "Edit Field" panel, enable the "Override default slug" option.
6. Next to the "Slug" input box, click on the "Dynamic Field" button (looks like a magic wand).
7. In the dynamic field modal that opens, select the "Category Name" field (or the field where you store the category name).
8. Once you've selected the field, append a forward slash ("/") before the dynamic field (e.g., "/{{Category Name}}").
9. Save your changes and exit the Collection Editor.
By following these steps, the URL structure for your Category Collection in Webflow will be modified to include the forward slash. Now, the URLs for your category items will be formatted as "site.com/blog/category/category-name" instead of "site.com/blog-category/category-name".
Keep in mind that modifying the URL structure of your existing items may affect the SEO and the links of those items. Make sure to set up proper 301 permanent redirects for any old URLs to avoid broken or lost links. Also, update any internal links or external references to reflect the new URL structure. Lastly, it's always a good practice to test your website thoroughly after making any changes to ensure everything is working as expected.