Grid
grid 九宫格，功能类似于微信钱包界面中的九宫格，用于展示有多个相同级别的入口。包含功能的图标和简洁的文字描述。
<div class="weui_grids">
<a href="javascript:;" class="weui_grid">
<div class="weui_grid_icon">
<img src="./images/icon_nav_button.png" alt="">
</div>
<p class="weui_grid_label">
Button
</p>
</a>
<a href="javascript:;" class="weui_grid">
<div class="weui_grid_icon">
<img src="./images/icon_nav_cell.png" alt="">
</div>
<p class="weui_grid_label">
Cell
</p>
</a>
</div>注意：九宫格图标约定尺寸是 28px * 28px （2x图即 56px * 56px）