How to hide View All Site Content for everyone except for Admin users in SharePoint 2010

look for this tag on default.master or the custom master page you are using:

<SharePoint:ClusteredSPLinkButtonid="idNavLinkViewAllV4"runat="server"PermissionsString="ViewFormPages"NavigateUrl="~site/_layouts/viewlsts.aspx"ImageClass="s4-specialNavIcon"ImageUrl="/_layouts/images/fgimg.png"ImageWidth=16ImageHeight=16OffsetX=0OffsetY=0Text="<%$Resources:wss,quiklnch_allcontent_short%>"

Replace the PermissionsString property in above tags from "ViewFormPages" to "ManageWeb" accesskey="<%$Resources:wss,quiklnch_allcontent_AK%>"/>