How to remove params from url codeigniter

Replace slug with id in your URLs.

This is how it works:

1) I'm assuming here a product website flow.
2) For a particular product page, displaying the product details need some data from the URL (it can be anything product id, product slug, etc).
3) Using product ids in URLs is not considered a good practice. Its neither SEO friendly nor User friendly. Below is the example of an URL using product id,

http://www.example.com/products/123/

4) Hence, an alternative to this is what is called as product slug
5) A slug (semantic URL or Permalinks) is basically a meaningful, seo friendly, human readable sequence of keywords separated by hyphens (or underscores). Below is the example of an URL using product slug,

http://www.example.com/products/apple-iphone-5S-16GB-brand-new/

Here, apple-iphone-5S-16GB-brand-new is a slug.

You can also understand from the URL of this page,

http://stackoverflow.com/questions/24800780/how-to-remove-params-from-url-codeigniter

where,
   24800780 = this is the unique question_id
   how-to-remove-params-from-url-codeigniter = this is the slug made from your question

How to use slug?

1) Ofcourse your product page needs some data from URL to understand which product to display.
2) Before we were querying our database using the id we are getting from the URL. But now we'll do the same thing (querying our database) just replacing id with slug and thats it!
3) Hence adding an additional column in your database named slug. Below will be your updated product database structure.

id  |  title  |  slug  |  price  |  thumbnail  |  description

In your code:

Assuming this to be your URL,

http://domain/sentencijos/autoriai/marselis-prustas

and this marselis-prustas might be your slug value which your controller function will receive and pass to the model which gradually use this to query the database.
For this, you have to create a new column (as explained above) which should have the value marselis-prustas and also other slugs.

Advantages of slug in URLs:

1) SEO Friendly
2) User Friendly
3) Clean and semantic URLs