blog-listのheader表示なおした close #557

![c8fe40d784e157b1d24fb9f5d52bed17](https://cloud.githubusercontent.com/assets/1044064/5047449/e9edab5e-6c58-11e4-9873-e69625c574a3.png)

![59d1757e26cd01efd04b39ea39244f9a](https://cloud.githubusercontent.com/assets/1044064/5047459/fa90dee0-6c58-11e4-98cf-5e2511b0402e.png)

hai