So-netブログ用パンくずリスト

article_has_category.html

<ol class="breadcrumbs">
	<li><a href="" title="blog name">blog name</a></li>
	<li><a href="" title="category name">category name</a></li>
	<li>article name</li>
</ol>

article_hasnt_category.html

<ol class="breadcrumbs">
	<li><a href="" title="blog name">blog name</a></li>
	<li>article name</li>
</ol>

breadcrumbs.css

.breadcrumbs{
	margin:1em 0;
	padding:0;
	list-style:none;
}
.breadcrumbs li{
	display:inline;
}
.breadcrumbs li:before{
	content:"\003e";
	margin:0 .5em;
}
.breadcrumbs li:first-child:before{
	content:"";
	margin:0;
}

breadcrumbs.rhtml

<% if:page_name eq 'article' -%>
<ol class="breadcrumbs">
	<li><a href="<% blog.page_url | html %>" title="<% blog.title | html %>"><% blog.title | html %></a></li>
	<% unless:article_category.name eq '未分類' -%>
	<li><a href="<% article_category.page_url | html %>" title="<% article_category.name | html %>"><% article_category.name | html %></a></li>
	<% /unless -%>
	<li><% article.subject | html %></li>
</ol><!-- / .breadcrumbs -->
<!-- / if:page_name eq 'article --><% /if -%>