Extracted source (around line #16):

13:
14:         <div id="header">
15:             <h1>
16:                 <%= link_to 'Home', :controller=>'posts', :action=>'index' %>
17:                 <%= link_to 'Add Post', :controller=>'posts', :action=>'new' %>
18:                 <%= link_to 'Add Category', :controller=>'categories', :action=>'new' %>
19:     <%= link_to 'Display ategories', :controller=>'categories', :action=>'index' %>