Tabs: Move logic for finding the tab list into its own function to al…

…low overriding for rare usage scenarios.

ui/jquery.ui.tabs.js

@@ -209,7 +209,7 @@ $.widget( "ui.tabs", {
	_processTabs: function() {
		var self = this;

		this.list = this.element.find( "ol,ul" ).eq( 0 );
		this.list = this._getList();
		this.lis = $( " > li:has(a[href])", this.list );
		this.anchors = this.lis.map(function() {
			return $( "a", this )[ 0 ];
@@ -241,6 +241,11 @@ $.widget( "ui.tabs", {
		});
	},

	// allow overriding how to find the list for rare usage scenarios (#7715)
	_getList: function() {
		return this.element.find( "ol,ul" ).eq( 0 );
	},

	_createPanel: function( id ) {
		return $( "<div></div>" )
					.attr( "id", id )