Apply class style to functions.php in WP3.1

From the “loop-single.php” template file:

<div class="entry-utility">
<?php twentyten_posted_in(); ?>
<?php edit_post_link( __( 'Edit', 'twentyten' ), '<span class="edit-link">', '</span>' ); ?>
</div>

So, you want to target the entry-utility class.

I only see this… Should I wrap it all in a <div>?

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Where do you see that code?

In loop.php.
WordPress v3.1

Again, you want to target the entry-utility</code class. From loop.php:

<div class="entry-utility">
...SNIP...
	<?php printf( __( '<span class="%1$s">Posted in</span> %2$s', 'twentyten' ), 'entry-utility-prep entry-utility-prep-cat-links', get_the_category_list( ', ' ) ); ?>
...SNIP...
	<?php printf( __( '<span class="%1$s">Tagged</span> %2$s', 'twentyten' ), 'entry-utility-prep entry-utility-prep-tag-links', $tags_list ); ?>
...SNIP...
</div><!-- .entry-utility -->

where is .entry-utility used?

I view the page with firebug and I don’t see that any of content on the line has a <div> or class applied to it by WP.

I did this in loop.php and it only works in index.php. No effect in single posts or categories.

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where is .entry-utility used?

*sigh*
Again, from loop.php:

<div class="entry-utility">

And again, from loop-single.php:

<div class="entry-utility">

All of the “Posted in” markup is inside of this DIV.

If you want to target the “Posted in” container directly, note these classes:

<span class="%1$s">Posted in</span> %2$s', 'twentyten' ), 'entry-utility-prep entry-utility-prep-cat-links', get_the_category_list( ', ' ) );

That sprintf bit produces this:

<span class="entry-utility-prep entry-utility-prep-cat-links">Posted in</span>

So, you can target either of the following classes:

.entry-utility .entry-utility-prep {}
.entry-utility . entry-utility-prep-cat-links {}