せりかログ

<span class="category">【<a>main</a>::<a>sub</a>】</span>

になっているところを

<span class="category">
<span class="category-main"><a>main</a>
<span class="category-sub"><a>sub</a></span>
</span>

category-main:before{
 content: "【";
}
category-main:after{
 content: "】";
}
category-sub:before{
 content: "::";
}

にしてもらえると楽しみが増えるらしい...
すごいことになるけど，IE対策入れるなら

<span class="category">
<span class="category-prefix">【</span>
<span class="category-main"><a>main</a>
<span class="category-separator">::</span>
<span class="category-sub"><a>sub</a></span>
<span class="category-postfix">】</span>
</span>

category-prefix, category-postfix, category-separator{
  display: none; _display:span;
}
category-main:before{
  content: "【";
}
category-main:after{
  content: "】";
}
category-sub:before{
  content: "::";
}