//on lines 105 & 106, change:

this.list = this.element.find( "ol,ul" ).eq( 0 );
this.lis = $( " > li:has(a[href])", this.list );

// to:

this.list = this.element.find( "nav" ).eq( 0 );
this.lis = $( " > span:has(a[href])", this.list );

// AND! /!\ Change all instances of "li" to "span"