I need to change the width of side panel in framework7 ??
Just change css of class panel.
default value (in framework7.ios.css) :
.panel {
z-index: 1000;
display: none;
background: #111;
box-sizing: border-box;
overflow: auto;
-webkit-overflow-scrolling: touch;
position: absolute;
width: 260px;
top: 0;
height: 100%;
-webkit-transform: translate3d(0,0,0);
transform: translate3d(0,0,0);
-webkit-transition-duration: .4s;
transition-duration: .4s;
}