Put structure fields in a div
Your question is indeed very confused. You might first clarify some Drupal basic concepts.

What is a block ? "Blocks are the boxes of content (such as "User Login" or "Who's online") that can be displayed in regions (such as footer or sidebar) on your page." Read Working with blocks (content in regions) for full understanding.

What is a content type ? We don't speak about structures but content types : a Content Type is a pre-defined collection of data types (Fields), this is how site editors can input original content on a Drupal site. Read Working with content types and fields.

What is a view ? "Using the Views module, you can fetch content from the database and present it to the user as lists, posts, galleries, tables, maps, graphs, menu items, blocks, reports, forum posts etc." Read Working with Views.

How to change the way blocks, fields, and so on display  ? this is a very wide question.


Without editing any code, you can make some basic choices in admin/structure/types/, and for the content type you'd like to edit,  manage display of each of the fields
you can install an infinity of contributed themes
you can create your theme, and then customize your regions, edit your stylesheets... A good place to begin might be the Theming Guide


Drupal is a very powerful CMS / CMF , but you'll have to deal with these concepts to feel a bit more confortable