how to change views output I need to create a block with eg the latest comments on the site.
when using views, concegui select the data I wanted, but the problem is that I need to edit the output of view (specify the html). I tried to make a tpl, but the fields when they get to this, are already formatted ([#markup]). also tried to make a block programmatically by accessing the fields of view, via $comments = views_get_view('last_opinions');, but so the fields do not bring content, but for example, ids (for referrals), or integers (in the case of dates), ....

basically, how to change views output?
Views out but can be changed at every stage of the process upto the field level. 

You can check the theme information in the other section towards the bottom of the right vertical tabs. There you would see the list of theme templates you can use. The last one is where the fields get themed. and moving upwards each of the wrapping themes such as the row theme the entire page theme etc. The name suggestion are also there in the same place. 

You can make the template as specific as you want.