yiisoft/yii — pull request #391 by pentium10 (2012-02-23 21:35:38+00:00)
Title: 282 allow c check box column header to behave like normal datacolumn

We resolved this by adding a $headerCheckBoxVisible property to CCheckBoxColumn. When that is set to false, the header cell will act as a normal one, so for example you can set a header even if $selectableRows is 2.