Wordpress IDs Classes and Tags Refrences

Class/ID	Description
#post-94	each post has a unique id ie #post-94 (94 represents post id)
.more-link	when using more tag , wordpress automatically adds class more-link to read more link
.post-edit-link	all post edit links has that class
blockquote	represents blockquotes
code	represents code block
ins	The <ins> tag defines text that has been inserted into a document
em	Renders as emphasized text
del	The <del> tag defines text that has been deleted from a document.
strong	bold paragraph
.alignleft	used for left alignment . Can be used with images img.alignleft , paragraph p.alignleft ..etc
.alignright	used for right alignment . Can be used with images img.alignright , paragraph p.alignright ..etc
.aligncenter	used for center alignment . Can be used with images img.aligncenter , paragraph p.aligncenter ..etc
.alignnone	used for none alignment . Can be used with images img.alignnone , paragraph p.alignnone ..etc
.size-thumbnail	used for images in thumbnail size {img.size-thumbnail}
.size-medium	used for images in medium size {img.size-medium}
.size-large	used for images in large size {img.size-large}

Class/ID	Description
.size-full	used for images in full size {img.size-full}

Widgets

Class/ID	Description
li.widget	All default widgets will have that class
li.widget_archive	All default archive widgets will have that class
li.widget_calendar	All default calender widgets will have that class
li.widget_categories	All default categories widgets will have that class
li.widget_tag_cloud	All default tag cloud widgets will have that class
li.widget_recent_entries	All default recent entries widgets will have that class
li.widget_recent_comments	All default recent comments widgets will have that class
li.widget_meta	All default meta widgets will have that class
li.widget_links	All default blogroll widgets will have that class
li.widget_search	All default search widgets will have that class
li#archives-1	every archive widget wrapped with  a <li> that has an unique id #archives-1 1 represents the id of that archive widget
li#calendar-1	every calender widget wrapped with  a <li> that has an unique id #calender-1 1 represents the id of that archive widget
li#categories-1	every categories widget wrapped with  a <li> that has an unique id #categories-1 1   represents the id of that archive widget

li#tag_cloud-1	every tag cloud widget wrapped with  a <li> that has an unique id #tag_cloud-1 1  represents the id of that archive widget
li#recent-posts-1	every recent posts widget wrapped with  a <li> that has an unique id #recent-posts-1 1 represents the id of that archive widget
li#recent-comments-1	every recent comments widget wrapped with  a <li> that has an unique id #recent- comments-1 1 represents the id of that archive widget
li#meta-1	every meta widget wrapped with  a <li> that has an unique id #meta-1 1   represents the id of that archive widget
li#linkcat-1	every blogroll widget wrapped with a  <li> that has an unique id #linkcat-1 1 represents the id of that archive widget
li#search-1	every search widget wrapped with a <li> that has an unique id #search-1 1 represents the id of that archive widget
h2.widgettitle	all h2 widget titles has that class
li.cat-item *	all items of categories list has that class
li.current-cat *	active (current) category item has that class
ul.children *	indicating second level list under categories list
li.page_item *	all items of pages list has that class
li.current_page_item *	active (current) page item has that class
li.current_page_parent *	parent of the current (active) page has that class
li.current_page_ancestor *	ancestor of the current (active) page has that class

Comments

ol.commentlist	all comments wrapped with ol list with class .commentlist
li.comment	all comments has that class .comment
#comment-1	each comment has a unique id (1 represents the id)
.comment-body #div-comment-1	comment div container has that class each comment div container has a unique id #div- comment-1 (1 represents the id)
.comment-author .vcard	avatar and comment author name are wrapped with a div that has these classes
.avatar	avatar image has that class each comment has a unique id (19 indicating the comment id)
cite.fn	comment author name wrapped with a cite that has class .fn
.comment-meta .commentmetadat a	comment time and edit link are wrapped with a div that has these classes
a.comment-edit- link	each comment edit link has this class .comment-edit-link
.reply	reply link wrapped with a div that has a .reply class
a.comment- reply-link	each comment reply link has this class .comment-reply- link
.comment- author-name	each comment wrapped with a div that has this class (name is the comment author name) this is helpful if you want to differentiate a certain user comments
.bypostauthor	post author comments are wrapped with a div that has this class

.odd .thread-odd	odd comments wrapped with a div that has these classes
.alt .thread-alt	the same as odd comments
.even .thread-even	even comments wrapped with a div that has these classes
.parent	each comment that has a reply is a parent and wrapped with a div that has this class
.depth-1 .depth-2 .depth-3 .....etc	threaded comments are represented in levels , so each level wrapped with a div that has a .depth-X class (X represents the level)

Gallery

.gallery	each gallery wrapped with a div that has this class
.galleryid-1	each gallery wrapped with a div that has this class (1 represents the id)
dl.gallery-item	each gallery item wrapped with a dl that has .gallery- item
dt.gallery-icon	each gallery thumbnail wrapped with a dt that has .gallery-icon
img.attachment- thumbnail	each gallery image of size thumbnail has that class .attachment-thumbnail
img.attachment- medium	each gallery image of size thumbnail has that class .attachment-medium
img.attachment- large	each gallery image of size thumbnail has that class .attachment-large

p.attachment

within attachment page image are wrapped with a p that has class .attachment

* these classes also available when using wp_list_pages() and wp_list_categories() functions .