In the current release of Sitefinity, editing blogs is only possible from the backend of the project.
For displaying items by category, you can use the Category widget (Content >> Classifications >> Categories)
You can add Categories from Content >> Classification of Content >> Categories. After you have created the categories you need, you can add these categories to content items from the Categories and tags
(when creating or editing the item). I hope that helps.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items