I solved the problem by following solution:
TmplView = Backbone.View.extend({
initialize: function(){
this.render();
},
render: function(){
console.log(this.$el);
var template = _.template( this.$el[0].html(), {} );
this.$el[1].append( template );
},
});
var template1 = new TmplView({ el: [$("#tmpl1"), $("#firstDiv" ) ] } );
var template2 = new TmplView({ el: [$("#tmpl2"), $("#secondDiv") ] } );
If anyone might have a better approach, it will be welcome.