Tags and Categories use the same system, So that is not possible. It will not hurt SEO in any way to use php-2, it is just visually displeasing.
Related Posts:
- How do I add a tag slug to a category URL to filter posts?
- Category and tag urls return 404 error
- Hide category name using mod_rewrite
- Is There a Difference Between Taxonomies and Categories?
- Can’t custom taxonomies have same terms (slugs) as categories?
- How do the ‘tag’ and ‘category’ (default) taxonomies do ‘save_post’ action?
- get all tags from category
- Filtering categories in the permalink structure
- 404 Error On Category and Tags Pages
- Checklist of selected categories
- Multiple post categories – single permalink
- Preventing index.php?category_name=something from redirecting
- how to use a different domain/subdomain for authors/catagories on single site?
- Sort posts by tags in category pages
- How to search for categories and/or tags?
- How to get the url to tag & category base set by the user?
- Filter categories using tags
- Sticky posts on home page, search, tag and archives without plugin
- Categories’ hierarchy in URL
- In the tag archive – display count of posts for each category they belong to
- Is it possible to disable certain user roles from creating tags?
- Automated adding of one tag to all the posts in a category
- Rewrite category slug
- Exclude most recent posts from specific category in wp_query()
- When using get_categories or similar, is it possible to filter results that contain certain Tags as well?
- Exclude subcategories from the url
- How to display only the parent category in the permalink
- Deleting All tags except categories Wp database
- Search by word, category, tag, author
- Remove Categories and Tags from Admin Dashboard
- How to filter archives both by category and tag?
- Get tags specific category
- How to show in search results posts with a particular tag in a particular category?
- Category vs Tag vs Table
- Help with multiple dropdown tags search
- Custom WP_Query for current category (in category.php)?
- Hide tag and category boxes from the post editor
- Retrieve all posts within tag OR category?
- How to find the number of Tags a post has?
- Categories not working – 404 Not found error
- How to not treat categories as tags in feeds
- Categories: A Greenhorn Question on Strategy (Not Code)
- How to customize tag and category post listings to show introductory content?
- force category base – archive pages work WITH & WITHOUT category base slug in url?
- Making a tourism information website [closed]
- Search Posts / Pages with multiple options?
- How get permalink for the current category or tag?
- Display tags from specific category in select fields
- Offline WordPress Application
- Find out which user created a category or tag?
- How to make 2 tag feeds show up on 1 page?
- How to change category and year archive permalinks/rewrite rules?
- Different templates for different category tags
- Site search needs to find posts for category topic AND Tag or keyword thats not in the post
- Pagination is not working properly in Product Category/Tag pages
- Get link which associated with a specific category and tag
- Read GET parameters in APACHE Mod Rewrite rules for WordPress categories in Posts
- Flat category URLs but retaining hierarchy?
- menu using category and tags
- limit a list of tags to one category [closed]
- Is there a reason I cannot get the current category in a loop?
- How to Remove a Title from All Category and Tags Page?
- How can I display tags as categories?
- How to get an array with all categories and corresponding names?
- Tags Instead of Category
- Use blog as base for tags and categories
- How to store category and tags separatly on wordpress?
- Filter categories/tags to display in multiple metaboxes for selection in back-end
- post_class remove tag- or category- from slug
- Custom url structure – pages under a custom post type
- Editing Loop So It Targets Specific Tags?
- Pretty URLs with Categories and Tags
- Autolinking keywords in text with tags
- Category URL Management
- Maintaining a separate posts page for certain categories and don’t show those on home page
- Are tags different than categories?
- What is the best way to add an advanced / intermediate / beginner tag to a post
- Display all categories but only if they have posts in them that have a specific tag assigned
- Help to display the current categories and tags of a post
- Using custom structure prefix showing 404 for sub-categories
- How to add tags under categories
- Add Post Categories in Post Tags Field Programmatically
- How to remove parent category from child category url using wordpress rewrite rule?
- How to show entries related to main category
- Automatically create tags and merge with categories
- How to assign Categories and tags inside the TinyMCE Editor for each Image?
- Remove “category” from permalink with add_rewrite_rule
- Re-coding category-template.php to go to custom URL
- Search by tag, category and author without plugin
- Limit Category/Tag Dropdown To blog_id in Multisite Install With Global Categories/Tags
- Tag Menu items based on their categories
- How to add an “All” category to the tag cloud?
- Create monthly archive for parent category
- Unable to get all tags from specific categories
- htaccess redirect for all categories converted to tags now showing 404
- Modify / Rewrite single template url structure
- altering theme – content generated by PAGES not PORTFOLIO
- Search tag within category
- What approach should I take for this URL structure?
- In my wordpress admin panel Suddenly The Category, tag and featured Image Option are not showing